I've not noticed him using the word "too often" so he must be using it properly.
I was so confused, I thought you were joking saying Dan literally says "too often" a lot. Then I re-read the thread title with that intention in mind, and the f-bomb suddenly became a verb, as if implying he says "TOO FUCKING OFTEN" or something.
Then I realized you emphasized too often to state he doesn't use F-bombs that much. I'm an idiot.