While I never actually counted, but I'd estimate way back in the day when I was younger and first discovered masturbation, it likely would have been maybe 4-5 times for the max (though not every day of course) and maybe 2-3 times a day after I started having actual sex. Nowadays, while it's limited to once a day every 2-3 days, every now and then I can achieve twice a day if I'm really horny though that would be the max I think I'd be capable of. Anymore and it would be very difficult to get off and even if I could, my cum would likely be tapped out.