I'm not an expert on houseplants by any means, but it does depend on the plant and the pot. For example, a pot with holes on the bottom will dry out much faster than a pot with no holes, since the water sinks to the bottom. And of course how much water you give them at a time can make a difference.
All I know is that I almost killed an aloe plant (which is supposed to be a resistant desert plant!) by watering it every week! But its pot didn't have any holes and the poor plant was drowning, and some of its leaves started molding from the inside out!
Poor plant .... I cut back on the watering though and it survived
My mom always just told me to water them when you stick your finger in the dirt and the dirt is dry, and her plants seem to be doing fine, except for when the cats eat them
I think she waters her plants once a week (less for the aloe plant, which I gave her when I left for grad school), maybe twice a week for a few of them?