Glad to see you have gone to dental school! If by "some" you mean "almost all," you may be closer to the mark. Every dentist I've ever had has recommended brushing after every meal, and for most people, that's at least 3x a day.

Last year, I traveled a couple of times with a wisdom tooth which was on this side of needing extraction, and I brushed it literally every time I ate or drank anything but water, which helped carry me over to when my dental insurance reset (I wasn't about to spend several hundred $$ unless it was a medical emergency). You can bet that took more toothpaste than on the average.

And I also use flouridated but non-SLS toothpaste; the combo can be hard to find. I try to refill my little 2oz travel tube from the big tube, but obviously, you can see why that's problematic, and I can't always find it easily on arrival, either.