~1000 blocks = 1 week

So 4000-ish for a month

52000-ish a year

It’s more about what accuracy you actually want.

If I was talking to someone and wanted to describe a week, I would say about 1000. A day is about 150. A year is about 50K. Everything is going to be “about” the same. If you need more precision, I would use the actual time.