Very rarely.
I have a thing about not using colourful language too often. It's not common with me.
I'm definitely not one of those people who go around cussing at people for the sake of it, or to fit in. I would say language is pretty pure.
The majority of people I know swear very often, over little things. I haven't got a problem with that - people can say what they want with me. But I enjoy being the different one, who doesn't go along with the words everyone else thinks is cool. I stand out, and I say no to swearing.