It's different for everyone. Some have multiple crashes, others like a clock exactly every 3 hours, some daily, others play throughout day without any (if lucky). Why? Who knows.
I would suggest not playing any "important" content on 32 bit. Meaning no raiding or 6v6.
I would suggest to use
EffectRemover (stand-alone application) to removed effects of classes (it keeps animations) and play on lowest settings in-game.
In BnSBuddy try setting [Settings > Page 3 > Auto Clean "On", Interval "5" min] it might prevent some crashes from occurring.
Do "sfc /scannow" as administrator in command line to make sure your OS is not fucked up in some way.
After crash check Event Viewer > Windows Log > Application, become a geek and see if it's fixable.