חשבון החשמל כולל תקופת חשבון של חודשיים.

Because it is part of two different phrases:

• חשבון החשמל = the electricity bill
• תקופת חשבון = billing period or literally bill period/account period

So the first חשבון means the actual bill, and the second one is part of a phrase describing the period the bill covers.

This is because Hebrew often uses a construct phrase (called smikhut) instead of of.

• חשבון החשמל literally means bill of the electricity
• In natural English, that becomes the electricity bill

In this kind of structure, the first noun usually does not take ה־. The definiteness comes from the second noun:

• חשבון חשמל = an electricity bill
• חשבון החשמל = the electricity bill

So חשבון החשמל is definite even though חשבון itself does not have ה־.

For the same reason: it is also a construct phrase.

• תקופה = a period
• תקופת חשבון = a billing period / a bill period

When a noun comes before another noun in this pattern, it often changes form. Here:

• תקופה becomes תקופת

This ־ת ending is very common with feminine nouns in the construct state.

כולל means includes.

It is the present-tense masculine singular form of the verb לכלול = to include.

It matches חשבון החשמל, which is grammatically masculine singular:

• חשבון החשמל כולל = the electricity bill includes

In this kind of billing sentence, English might also say covers, so the idea is:

• The electricity bill includes / covers a billing period of two months.

Here של connects the phrase תקופת חשבון with its length:

• תקופת חשבון של חודשיים = a billing period of two months

So של here is not really showing possession. It is more like of in English when describing size, duration, or type.

You can think of it as:

• a period of two months
• a billing period of two months

חודשיים is the special Hebrew form for two months.

Hebrew has special dual forms for some words, especially common units like:

• יומיים = two days
• שבועיים = two weeks
• חודשיים = two months
• שנתיים = two years

So חודשיים is the most natural way to say two months here.

שני חודשים is also grammatically possible in some contexts, but חודשיים is very common and natural when talking about a duration.

Yes, תקופת חשבון is understandable and works, especially in formal or utility-bill language.

Depending on context, Hebrew may also use expressions like:

• תקופת חיוב = billing period
• תקופת החשבון = the billing period
• מחזור חיוב = billing cycle

So the sentence is fine, but in some real-life documents you might also see תקופת חיוב or מחזור חיוב.

The sentence is:

• חשבון החשמל = the electricity bill
• כולל = includes
• תקופת חשבון של חודשיים = a billing period of two months

So the order is basically:

subject + verb + object

That is very similar to English:

• The electricity bill
  • includes
    • a two-month billing period

What may feel unusual is that Hebrew builds noun phrases differently, using construct forms like חשבון החשמל and תקופת חשבון.

A natural pronunciation is:

cheshBON ha-chashMAL koLEL t'kuFAT cheshBON shel chodSHA-yim

A few notes:

• ח is a throaty sound, like the ch in German Bach or Scottish loch
• stress is usually toward the end in these words:
  • חשבון = cheshBON
  • חשמל = chashMAL
  • כולל = koLEL
  • תקופת = t'kuFAT
  • חודשיים = chodSHAyim

In practical terms, it means the bill covers a two-month billing period.

So if you saw this on a utility bill, the intended meaning would usually be:

• the charges on this bill are for a period of two months
• the billing cycle lasts two months

So כולל literally means includes, but in context the idea is closer to covers.