For example, when you buy a car, you start becoming more aware of cars with a similar make and model. The number of that type of car hasn't increased, but your awareness of it has.
Similarly, when you learn a new word, you start hearing the same word used in different places. You probably just filtered the word out previously, but now you've become aware of it.
How do you describe the phenomenon when you become more aware of something after an initial or significant exposure or experience with that thing? What term or word can you use?