What does il y a combien mean?

"Il y a combien" in French means "how many" or "how long". It's used to ask about a quantity or duration.

Here are some examples:

* Il y a combien de personnes dans la pièce? (How many people are in the room?)

* Il y a combien de jours que tu es ici? (How many days have you been here?)

* Il y a combien de temps que tu as déménagé? (How long ago did you move?)

Note: The specific meaning of "il y a combien" depends on the context. If the question is about a countable noun, it means "how many". If the question is about a period of time, it means "how long".