Wiktionary
screen time
alt. The duration for which something is visible in film or television. n. The duration for which something is visible in film or television.
Wikipedia
Screen time
Screen time is the amount of time spent using a device such as a computer, television, or video game console. It can be an element of a sedentary lifestyle.
Usage examples of "screen time".
Charlton Heston had lifted up his staff and they'd all been organized and ready to go, and the whole clear-out had taken about three minutes of screen time, goats and granddaddies and all, leaving not so much as a crumpled bread wrapper or a pile of dog droppings on the tidy streets of Thebes.