From a 2022 report, trivially searched-for on Google:

> According to the Federal Aviation Administration, more than three dozen instances of cracked windshields have been reported by airlines over the past five years.

https://www.fresnobee.com/news/local/article260551697.html

The most infamous incident with a cockpit window is probably British Airways Flight 5390. An incorrectly installed window blew out, causing one of the pilots to be partially ejected.

https://en.wikipedia.org/wiki/British_Airways_Flight_5390

Here's a link to an Aviation Herald search for "windshield crack". Looks like a lot of bird and hail, but also a fair number of them just cracking.

https://avherald.com/h?search_term=windshield+crack&opt=0&do...

There are lots of Boeing on there, but unsure what the ratio of Boeing to Airbus there are in service. Certainly some Airbus on there as well.

This article from 2014, predating all of Boeing's recent failures, claims it is a regular occurrence and is also not always reported because it's a relatively minor thing to happen:

https://www.linkedin.com/pulse/20140507001219-90103575-crack...

A cursory Google suggests that it is not an uncommon occurrence.

~ weekly, globally.