In the video below, this guy (UmpireTeacher) is instructing people not to call time to clean the plate. But, he goes on to say that nobody should be making a play when his back is to the game. So, isn't that basically the same thing as calling time without actually using the words? If you can't make a play, then time is out, right?
I don't know who this guy is, if he is any good or if he even knows what he's talking about. I was just looking for some more information on the subject because I find the nuances fascinating. BTW - the umpire in our HS summer game called timeout to clean the plate last night.
https://www.youtube.com/watch?v=18BhxCre2ws