Happens to me all the time. I mean, not that I necessarily hear NEW words that often, but obscure or oddly specific words. Names, too. Like if I think to myself, 'Who's the guy that wrote the 3:10 to Yuma soundtrack.... oh yeah, Marco Beltrami.' Within a day or two (it seems like without fail) I'll stumble across a movie or show where he did the soundtrack. Sometimes I think it's subtle mind-control by the lizard people who run our zeitgeist.... but honestly it's just an affirmation bias that happens naturally in your head. Like how it seems like a lot of street lamps turn off as you're watching. They turn off all the time, but you only notice when you're watching. Same principle -- you hear new words all the time, but when you hear it twice it seems to be happening much more than it is.