First year I definitely put the most time to because I experimented with different study techniques (ended up finding a lot of inefficiencies which I got rid of in 2nd year, saving more time).
Hmm, so for Bio I would take like 2-3 hours to summarise each lecture (sometimes longer because it took a fuckload of time to decipher my handwriting and rewatch the lecture for things I missed), then I'd do the necessary exercise questions for Physics, Maths and Stats, Chemistry I sorta crammed from what I remember. I don't really remember how much time I invested per week because I've always concentrated on knocking off my "to-do-list" of work.
I think most weekdays I stayed in the biomed library from like 12-6pm and then did a little bit more study when I got home. In SWOTVAC there was a day where I studied continuously from 8AM-2AM. Which is NOT NECESSARY AT ALL, this was very excessive and I was pretty insane to think it was.
In second year I got it down to maybe 2-4 hours (excluding lectures) per day which was quite manageable.