Depends on the tyre and where I’m riding. I used to reckon a pair of Maxxis DH tyres would just about last a 2 week holiday – ie 12 to 14 rides.
Conti Rubber Queens just don’t seem to wear, ever. Carcasses seem quite fragile though, so I’ve stuck one on my hardatil which doesn’t get the same kind of abuse as the FS.
HR Mk II 3C about 6 months on the front before the side knobs are hanging off and the edge grip gets really unpredictable.
A Minion was lasting much better until 2 pretty tough days in the Lakes grond the edges off the side knobs. It’s still working OK in the dry though as they’re just worn, not loose.
On the back I’m much less bothered. Currently have an Ardent on with no side knobbles at all. That will be going this week, as it’s starting to get quite wet now.
I’d be happy to get 4400km out of a road tyre!!