I think atomic commits can either bump or decrease your commit frequency.
If you had a giant piece of logic that wouldn't be atomic in multiple commits, but you have multiple commits on your machine for the sake of saving your butt in case you roll down a weird rabbit hole, then you'd probably squash before merging into master and end up decreasing your total quantity of commits.
If you had a lot of small changes that all were safe seperately, you might break up what could have been a single commit into several commits so that you have a more descriptive history, and increasing your quantity of commits.
If you had a giant piece of logic that wouldn't be atomic in multiple commits, but you have multiple commits on your machine for the sake of saving your butt in case you roll down a weird rabbit hole, then you'd probably squash before merging into master and end up decreasing your total quantity of commits.
If you had a lot of small changes that all were safe seperately, you might break up what could have been a single commit into several commits so that you have a more descriptive history, and increasing your quantity of commits.