Uhm.. im gonna say it is largely dependent on the school. For me, i had two big papers due first year (that whole, find all these journals and write like 3-4 pages on this topic). Second year had four of those papers. Lots and lots of things like reflection essays (which are dumb and only credit for doing the assignment). Trying to think what other written assignments we had...
Third year, it depends on the clerkship. Had to write a two page paper for psych and a reflection essay for peds (which was only at the site i was at for peds.. but one page of bs about what you learned about yourself). H&P’s and Progress Notes (every single day) on all clerkships, but, you do this as a resident so get used to that. My school also has a professionalism development course that we have to write little blog entries on a given topic like every two months or so. This is like three paragraphs max and it is all that reflection stuff. Most of my clerkships had oral presentations I had to give.