Well then, there needs to be a lazy guy also pulling the rope from the other side for the statistical standard curve.
I check the oil level maybe after every 3rd to 4th gas tank filling. Equals 600km to 800km.
Most of the time there is not vey much oil "missing", but I then still refill a few little gulps to top it up again. Oil is also coolant here.
And I don´t go by time here, I go by driven Kilometers. Why? Because why should my scooter burn oil standing, resting and sitting still when not been driven for a shorter or even longer while. If it was leaking oil, I would be able to see oil on the ground underneath it. And if the piston rings were about to fail and burn excessive oil, I would also recognise it by seeing the blue smoke (burnt oil) coming out of the exhaust pipe while riding the scooter.
But of course, if you want to be a 1000% on the safe side, check as often as possible and as often as you like.