If you are like Ryu Seung Min: half a day.
If you are like my training partner: 1.5 years.
If you are like me: 6-8 months.
All rubbers drop in performance after a month or so. No rubber is "significantly" more durable than another. Surface changes become noticeable after 3-4 months. If you boost regularly, or don't care much about subtle changes, sure you can get a year out of most rubbers.
Cheers.
Does this have anything to do with playing hours or just how hard you hit and how much you engage/use the topsheet and sponge? Like if I play 2-3h/week is it the same as 5h/week?