How much time would be "too much" to get to know a person without asking them out?

I've heard that 3 months of trying to get to know the person would the the "average" time to get to know them before asking them out.

Is this accurate?

Would this be enough time even if you barely see the person only once and/or twice a week for 15 minutes without any phone number and/or social media account?

What would it be the "sufficient time" for you?

How much time would be "too much" to get to know a person without asking them out?
Post Opinion