How many Christmas carols have the word Joy in them?

It's a safe guess Christmas has the largest repertoire of songs of any Christian holiday. This allows for the fact some Christmas carols are not really Christmas -Oriented ( for example, Jingle Bells, Home for the Holidays, Sleigh Ride) but have become seasonal favorites not played at other times. It's a safe estimate, including borderline Yule songs- there must be at least 300 or 400.