How often do you check roots?

[Corsetière]

I wondered if you guys routinely pull your orchids out of their pots to inspect the roots? When I first started buying orchids I bought a lot of "bargain" sale orchids - most of which I discovered to have root rot when I depotted the plants at home. I've definitely made some strides with some of these problem children, but often I have noticed I do not completely eradicate the rot on the first shot. I have gotten to the point where I am very nervous of any root rot and wondered if some growers just routinely do a root check every couple of weeks or if this practice of pulling the plant out of the pot so often would be harmful to it?