Hoe often should a fridge run/defrost ?

…this is driving me bonkers… it’s been unusually hot lately and a couple of days ago i had water in the bottom of my fridge. So I turned it up from 3 to 4. No more water in the bottom , but now it seems to me that the things is running much more often than it should. The temperature outside has dropped, but thye fridge still seems to defrost more than 3 times a day (water in the channels at the back of the fridge that let the water run out)
I thought something like that should happen like once a week or so, but I don’t know zip about the tech in a fridge :(. Now I’m tempted to call in a technician, but the quotes I got until now were quite high and I don’t want to waste money and than learn that it’s been for nothing.
I’d appreciate some cool (ahaa ha… ) insights here ?

ta
Zumpel