I rarely break strings. I play a classic (nylon strings), and if a string breaks, it's invariably the D, which is the thinnest of the wound strings.

I've never had one break while I was playing the guitar. I discover it when I open the case, and there is the string, hanging slack and broken at the bridge (the most acute bend in it's entire length).

It's happened maybe a half-dozen times in 56 years of playing the guitar.

Don Firth