Η διάρκεια συμβολαίου και η λήξη φαίνονται στον λογαριασμό.

Because the subject is actually two things joined by και:

• Η διάρκεια συμβολαίου = the contract duration
• η λήξη = the expiration / end date

Together they make a plural subject, so the verb is plural:

• φαίνεται = it appears / is shown
• φαίνονται = they appear / are shown

So the structure is basically:

• The contract duration and the expiration are shown on the bill/account.

The dictionary form is φαίνομαι.

This is one of those Greek verbs that has a middle/passive form but often an active-like meaning. Depending on context, φαίνομαι can mean:

• I appear
• I seem
• I am visible

So here:

• φαίνονται = they appear / they are shown / they can be seen

In this sentence, are shown or appear is the most natural translation.

Because συμβολαίου is the genitive singular form of συμβόλαιο.

• συμβόλαιο = contract
• συμβολαίου = of a contract / of the contract

So:

• η διάρκεια συμβολαίου literally means the duration of contract
• more natural English: the contract duration or the duration of the contract

The genitive is very commonly used in Greek to show possession or a close of relationship.

Greek often leaves out the article in this kind of phrase when speaking more generally or using a label-like style.

So:

• η διάρκεια συμβολαίου = contract duration / duration of contract
• η διάρκεια του συμβολαίου = the duration of the contract

Both are possible, but they do not feel exactly the same.

Without του, the phrase sounds a bit more like a category, heading, or standard information field, which fits very well in billing, customer-service, or contract language.

λήξη means ending, expiration, or expiry.

In this sentence, it most likely refers to:

• the contract end
• the expiration date
• the date the contract ends

The exact English wording depends on context. On a bill or account page, λήξη often means something like expiry or end date.

It can mean either, depending on context.

λογαριασμός can mean:

• account
• bill
• statement
• sometimes even invoice in certain contexts

So στον λογαριασμό could mean:

• on the bill
• on the account
• on your statement

If this sentence comes from a telecom or utility context, bill or account statement is often the best fit.

στον is a contraction of:

• σε + τον = στον

So:

• σε = in / on / at / to
• τον = the (masculine accusative singular)

And λογαριασμό is the accusative singular form of λογαριασμός.

So:

• στον λογαριασμό = on/in the bill/account

After σε, Greek normally uses the accusative.

Because Greek σε covers several meanings that English splits into different prepositions, including:

• in
• on
• at
• sometimes to

So Greek says:

• στον λογαριασμό

while English may say:

• on the bill
• in the account
• on your statement

The exact English preposition depends on what sounds natural in English, not on a one-to-one match with Greek.

Greek often repeats the article with each noun in a pair, especially when both nouns are being clearly identified as separate items.

So:

• Η διάρκεια συμβολαίου και η λήξη

is very natural and clear.

It helps show that we are talking about two distinct pieces of information:

1. the contract duration
2. the expiration / end date

In English, we often do the same:

• the contract duration and the expiration date

Not especially. The sentence follows a very normal Greek pattern:

• subject + verb + place

So:

• Η διάρκεια συμβολαίου και η λήξη = subject
• φαίνονται = verb
• στον λογαριασμό = where they appear

Greek word order is more flexible than English, but this version is neutral and straightforward.

Yes. That is a perfectly reasonable translation.

Depending on context, you could translate it as:

• The contract duration and expiry are shown on the bill.
• The contract duration and end date appear on the account.
• The duration of the contract and its expiry are visible on the statement.

The best choice depends on what kind of λογαριασμός is meant and how natural you want the English to sound.

Yes, it is a very common kind of administrative or customer-service phrase.

• διάρκεια = duration
• συμβολαίου = of contract

So διάρκεια συμβολαίου is basically contract duration / contract term.

In many real-life contexts, especially phones, internet, subscriptions, insurance, or service agreements, English might even translate it more naturally as:

• contract term

Here is a useful breakdown:

Nominative (used for the subject):

• η διάρκεια
• η λήξη

These are the things doing the verb φαίνονται.

Accusative (after σε):

• τον λογαριασμό

That is why you see:

• στον λογαριασμό = σε + τον λογαριασμό

And inside the subject phrase, you also have a genitive:

• συμβολαίου

So this sentence contains three important cases:

• nominative: the subject
• genitive: of contract
• accusative: after σε

Yes, something like that is possible, but it changes the style.

For example:

• Η διάρκεια του συμβολαίου και η λήξη του φαίνονται στον λογαριασμό.

This makes the reference to the contract more explicit. It sounds more like full prose.

The original:

• Η διάρκεια συμβολαίου και η λήξη φαίνονται στον λογαριασμό.

sounds more concise and administrative, like text on a website, bill, or customer information page.

So the original is very natural for formal service-related language.