Does anyone know what the phenomena is called where you think about something/hear about something and then suddenly you stumble across multiple instances of it

Does anyone know what the phenomena is called where you think about something/hear about something and then suddenly you stumble across multiple instances of it in the wild? Just yesterday I began configuring the textwidth/wrap porperty in my Neovim. I went to bed thinking that maybe a hard-capped width of X*2 cahracters would be better, so I can fit more text "into a square" -- which basically means that I focus on a point in the middle of the text and see X characters left, right, up and down. Now today, the first article I read is about the same exact problem :)