Everyone's MCAT prep experience is incredibly different. I know people that could crank a 128 CARS right from the beginning because they also loved English and reading growing up. I also knew people that took 5 AP classes per year and entered college with a solid foundation in multiple subjects and got >500 on their Kaplan diagnostic. A friend of mine came from an underprivileged background and couldn't even pass his freshman classes, let alone think of the MCAT.
Some people prep for a summer. Others prep for a year.
At the end of it all, you are unique. You have your own strengths and challenges. I'm just telling you this because simply knowing how much someone else studied won't help you much. But since you asked, I studied in 3 hours sessions around 5-7 times a week for several months.