An unspecified period of uninterrupted free time. We'll have a pretty good pocket of time between our flights, so let's sit down to eat a proper meal.I've got a pocket of time this Saturday if you want to meet up then for a coffee.
pocket of time
n. a period of available time, as might be found between appointments. I had a pocket of time between stops that I used to get myself one of those incredibly expensive cups of coffee.