Όση δουλειά κι αν έχω τον Οκτώβριο, κάνω λίγη επανάληψη κάθε βράδυ.

It’s a set pattern meaning no matter how much ... or however much ....

So:

Όση δουλειά κι αν έχω
= No matter how much work I have

This structure often introduces a contrast with the main clause:

• Όση δουλειά κι αν έχω, κάνω...
• However much work I have, I still do...

It expresses concession: something is true despite the situation in the first clause.

Because όση agrees with δουλειά.

The word comes from όσος, όση, όσο, and it changes form to match the noun’s gender and number:

• όσος = masculine
• όση = feminine
• όσο = neuter

Since δουλειά is feminine singular, Greek uses όση:

• όση δουλειά
• not όσο δουλειά

In English, how much does not change, but Greek makes this agreement.

κι αν is basically και αν, with κι being the shorter form of και before a vowel.

In this pattern, it does not literally mean and if in normal English. Together with όση, it helps form the concessive meaning:

• όση ... κι αν ... = no matter how much ...

So in this sentence, κι αν is part of the grammar of the expression, not something you should translate word-for-word.

You may also see:

• όση δουλειά και αν έχω

This means the same thing; κι αν is just more natural and common in speech.

Yes, this is the kind of environment where Greek uses αν with a subjunctive meaning.

In Modern Greek, the verb form often looks the same as the present indicative, especially here:

• έχω can look identical whether it is functioning as indicative or subjunctive.

So although the form is έχω, the structure κι αν έχω has the sense of:

• even if I have
• no matter how much I may have

The important thing for learners is to recognize the whole pattern, rather than trying to translate each word separately.

Because δουλειά here works like a mass noun meaning work, just as in English.

So:

• όση δουλειά έχω = however much work I have

Greek could use plural nouns in other contexts, but here the singular is the natural choice because the idea is amount of work, not number of separate jobs/tasks.

Greek normally uses the definite article with months:

• ο Οκτώβριος
• τον Οκτώβριο

When a month is used as a time expression meaning in/during October, Greek often uses the accusative:

• τον Οκτώβριο = in October / during October

So:

• έχω τον Οκτώβριο πολλή δουλειά
• I have a lot of work in October

For English speakers, the article can feel surprising, because English usually says just October without the.

Because κάνω επανάληψη is a very common Greek expression meaning do review / revise / go over material.

So:

• κάνω επανάληψη = I review / I revise
• κάνω λίγη επανάληψη = I do a little review / I revise a bit

This is a normal collocation in Greek, especially in school or study contexts.

Even if English often prefers a simple verb like review, Greek very naturally uses κάνω + noun here.

Because λίγη agrees with επανάληψη, which is feminine singular.

• λίγος = masculine
• λίγη = feminine
• λίγο = neuter / adverbial use

Since επανάληψη is feminine, Greek says:

• λίγη επανάληψη

Compare:

• λίγη δουλειά = a little work
• λίγο νερό = a little water

Because κάθε normally goes directly with a singular noun and does not need the article.

• κάθε βράδυ = every night
• κάθε μέρα = every day
• κάθε χρόνο = every year

This is just the normal pattern in Greek.

So κάθε βράδυ works as an adverbial time expression: it tells you when the action happens.

Because Greek often puts this kind of concessive clause first to set up the contrast.

So the sentence is structured like:

1. No matter how much work I have in October,
2. I do a little review every night.

This order feels natural and emphasizes the idea of persistence: despite being busy, the speaker still keeps up the review.

You could also rearrange the sentence in Greek, but the given order is very natural and clear.

The comma separates the introductory concessive clause from the main clause.

• Όση δουλειά κι αν έχω τον Οκτώβριο,
  subordinate/concessive clause
• κάνω λίγη επανάληψη κάθε βράδυ.
  main clause

This is similar to English punctuation in sentences like:

• No matter how much work I have in October, I do a little review every night.

So the comma helps show the sentence structure clearly.