How much study time is needed for step 2 as far as weeks and hours per day?

I don't think there is an easy answer to that question. It really depends on you. I studied for three weeks (not very intensively I might add). I finished q bank and first aid for step II. I did extremely well. Most of my classmates are studying for about a month while on a light rotation. That seems like a pretty good plan. The truth is: it is really up to you.
Good Luck