its only possible to have chicken pox twice and you would have had to have been born at just the right time. it has to do with the virus mutating. in any case, chicken pox never leaves your body. it remains dormant and will become shingles when you get very old.
5 times? Never heard of that. I suppose you could have it twice if the first time was an extremely mild case, but it's pretty much a one-time deal. If you're worried about shingles, there is a vaccine you can get.