Here's a question: Where did the term, "helpmeet", originate?
In the KJV, the verse in Genesis says, "I will make him an help meet for him." (i.e. a help fit for him)
So I'm not sure how "help meet" became one word...
I could go on about "common usage errors" such as "she imagined herself walking down the aisle" (the center row in a church, etc. is called the nave), but that's rather pointless, so I'll just finish this post here.