Kind of a toss-up for me. I can't even guess just how many rds. have been through my Marlin 39M in the more than 25 yrs. that I've owned it. Other than cleaning, no other maintenance at all. Nothing's broken. Nothing's worn out. A very conservative estimate would be on the close order of 35,000.
Both my Springfield Champion and full-sized EAA Witness 9x19 have seen more than 7K with only a spring change when Major Nonte's rule-of-thumb 1.5-2 coil difference in length was noted when compared to a new recoil spring. FP springs were changed at the same time, mostly because they were included in the Wolff kits.
My Dan Wesson 15-2 is another that's seen a lot of use over 30-odd yrs. The bluing shows some holster wear and it's gotten the inevitable small dings and scratches, but it hasn't broken a part, loosened up much nor worn anything out yet. Again I can only guesstimate a rd. count, but it has to be over 35K. Mostly cast bullet handloads in various flavors, and most of them relatively mild (158 gr. LSWC c. 900 f/s.) because they're inexpensive, superbly accurate in my revolver and have more-than-adequate power for most of the tasks I use it for.
My Chinese commercial model SKS has fired more than 10K since 1988. No issues at all.
FWIW, I once owned a Winchester M52-C purchased at an auction from a Big 10 university's Rifle and Pistol Club when it was disbanded due to PC silliness. The log book which came with it documented over 500,000 rds. of use with no parts failures or non-routine replacements (springs; worn extractor) noted.