The other day I caught myself doing the exact same thing after noticing a couple of unfamiliar accounts popping up in someone’s likes and it made me a bit curious without any real reason. I went into their following list just to see if anything looked recent and at first it felt completely mixed, but after checking again later it started to make a bit more sense. I randomly found recently-followed and it actually matched what I was noticing. It’s not super precise, but if you look a few times and compare, you can kind of figure things out.