(Excuse the horrible title of this question. I just can't find the proper (?) words. Please edit as pleased.)
It happens many times to me that when I learn about something (e.g. a word, a concept, etc), I suddenly start to see it in many places. This is not due to a change in external circumstances but to "the way you look at things".
For example, I recently learned the word "oftentimes". I was not aware it existed before. And yet, I suddenly started to see it in many places, so that it caughts my attention. Naturally, people did not suddenly started to use this word, so this was clearly a change in my perception, due to "conceptual learning".
My question is, is there a word for this psychological phenomenon? I hardly find the proper words to search for this, so my efforts at the moment have been pointless.