"volitionally" is a pretty rare word, I think. It doesn't even seem to be in many dictionaries. I think the only reason I understand it at all is because its meaning is so easy to deduce; if I had to understand it based on the frequency of previous encounters I don't think I'd know what it meant.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.