I tried that for a while. Turned out the total elapsed time I was able to tolerate listening to discs was zero. So now I just play records. When they sound good I play more. But they always sound good.
On an Index card I make a Roman numeral mark for every album side. 20 minutes per sid. Total divided by 3 is the hours. Not exact. But its closer than the hrs shown on my lawn tractor. I forgot to turn off ignition and it now shows 60-70 more hrs than actual. Same would happen with this timer. Forget to stop and I bet your time is messed up (fubar) An example iiii/ iiii/ iiii/ =15 sides or 5 hrs
And yet nobody, even the manufacturers, can say how many hours a stylus can play before it needs replacement.
Maybe just listen for a degradation of image and soundstage. Maybe depth of image and layering. Those are indications that the stylus is worn and needs to be evaluated by a professional or replaced.
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