Is 3 times a week too often to straighten my hair?

I couldn't really think of a good way to state the question.. Sorry if it was confusing, lol. But I have horrible hair! It's thick, frizzy, and soo curly. If I stick my hand in my un-straightened hair, I can tell it's about 8 inches of hair. I straighten my hair about 3 times a week, is this too often? I use a deep conditioner every time I wash it, and I always use the Chi brand protectant spray. If 3 times a week is too often, how often do you recommend? Ps.. I know straightening is horrible for your hair, especially if you have a Chi which gets superrrr hot, but please don't give me some lecture about enhancing my "natural curls". Thanks (: