It's called the
Baader-Meinhof Phenomenon!
The Baader-Meinhof phenomenon occurs when a person, after having learned some new piece of audible or visual information like a new fact, word, phrase, image or other item for the first time, encounters that item again, perhaps several times, shortly after having learned it.
Several members of my family have been running into it since we named our son Atticus. Since he was born lots of them have told me how they never really heard it used before, but now they see it in the credits for TV and movies, they over hear it in public, etc.
It's very, very common and not
just you