This is the 12902nd most frequent Turkish word.
kac
"Kaç" means "how many" or "how much" in English.
In this case, 'kaç' is used to inquire about the quantity or number of pens someone wants to buy.
Bu kalemlerden kaç tane almak istiyorsunuz?
How many of these pens would you like to buy?
In this sentence, 'kaç' is used to question the length of time the meeting will last, focusing on hours.
Kaç saat sürecek bu toplantı?
How many hours will this meeting last?
Here, 'kaç' is asking about the duration in years someone has been living in a certain place.