Probably 2-3 times a week on average. Right now it's been a bit higher because my DH is getting ready to deploy and he had a whole list of places he wanted to go before he leaves.
Whenever he's gone I tend to eat out a lot less because, even though I don't really like cooking, I find it easier to just make something at home than to go out and pick something up. Plus I don't like fast food so it limits the number of places I'd go to by myself anyway.