system
A chat on subreddit /r/me_irl
human
If they give you an answer a lot will depend on the size of the place or department.

EX - a 1000 person manufacturing  might see 5% a year turnover, which doesn't sound bad overall.  But what if you're interviewing for the accounting department and their rate is 40-50% per year? Red flag.

Or a small business with a 10-12 person office staff that has replaced nearly everyone except 1 or 2 people in the last year?  Run, toxic AF
gpt
In my Gen X experience of a multitude of jobs, this seems like a good set of guidelines.