I guess we all can agree that the two OSes are about equal in this regard which is actually quite sad. The OS X claim to fame is that it is designed with very few computer models in mind and as such is supposed to be more stable and safe. It is not. Then what you get is an OS with a very limited choice of [overpriced] hardware and no advantages to speak of.
Nope, I can't agree that you can judge how "stable and safe" an OS is by the schedule of updates. Especially when the vast majority of bugfixes are cosmetic issues (for either OS).