Last year (D1), we had about 2 exams every week starting in early September going all the way until May. We would even occasionally have 3 exams a week, and this didn't count practicals for various classes (anatomy, perio, etc). It was rough on a lot of us and I burned out in January and basically just did the bare minimum effort until summer rolled around (and then had to kick myself into gear for boards lol).
Now a D2, we've had about 2 exams a month so far (so 4-5 total), and its beginning to ramp up again to ~2 exams a week for the next few weeks and it will also cool back down to ~2 exams a month when we close in on December. A majority of my classes right now are simply midterm/final, with pharm being the only course with more than 2 exams.
D1 was definitely tough with basically 2 exams a week, but it forced us to learn how to not fall behind and how to effectively study for the next exam. It also prepped us pretty well for jumping right into boards once the school year ended. BUT, I much prefer my current exam layout with exams few and far between, with occasional "ramp-ups" of multiple exams. I have considerably more time to study subjects in depth, complete lab projects, sleep, and basically just have more time to myself since I'm not freaking out about the next exam that's coming in 2-3 days.