Conciseness versus Concision

I was wondering if "concision" was a real word or not. It sounds better to my ear than "conciseness", probably because "concise" is Latin and "ness" is German (see http://www.selfknowledge.com/63488.htm). I looked on the web and indeed, both are words, and there is an email discussion of the issue. It says that "concision" is the French equivalent. I must grant that "conciseness" is the commonly used word, but I think I'll switch to "concision" now.