I call it “dead time”. It’s time spent waiting for something, and you are captive. For example, when you are stuck in traffic, or waiting in a doctor’s office, or waiting for a slow computer to boot up. Minutes, maybe hours, of your life pass by, and you have to fill them with something. Some folks stare at their phones, some strike up perfunctory conversations with those around them, still others just sit and ponder random thoughts.
There can be better ways to use dead time. Prayer is certainly a good one. Planning some sort of service to others could be productive. Keeping your mind busy by bringing along a crossword puzzle or a word search would be beneficial (although not while driving!). Text a sweet message to someone who could use a little attention.
Make your dead time come alive. You only get so much of it.