कितनी बार? दिन में एक बार; दिन में दो बार।

once a day

Breakdown of कितनी बार? दिन में एक बार; दिन में दो बार।

• दिन में दो बार: twice a day
• कितनी बार: how many times?

Questions & Answers about कितनी बार? दिन में एक बार; दिन में दो बार।

Why is it कितनी बार and not कितना बार?

Because बार is treated as a feminine noun in Hindi when it means time/occurrence.
So the question word कितना changes to agree with it:

• masculine singular: कितना
• feminine singular: कितनी
• plural/common counting contexts: often still कितने in many patterns

Here, बार is feminine singular, so कितनी बार? is the natural form for How many times? / How often?

What exactly does बार mean here?

In this sentence, बार means time in the sense of an occurrence or instance, not clock time.

So:

• एक बार = once / one time
• दो बार = twice / two times

This is a very common word in Hindi for frequency.

What does दिन में mean literally?

Literally, दिन में means in the day.

• दिन = day
• में = in

But in this kind of sentence, दिन में is best understood as per day / in a day / during the day.

So: