Wiktionary
n. (context US English) A period when traffic is light
Usage examples of "off-hour".
Embarrassingly enough, Detective Bellefleur took to hanging around the bar on his off-hours, never drinking more alcohol than one beer, but observing everything that took place around him.
Billy Ray continued his off-hours boozing, brawling, and other sundry endeavors.
Give a bus driver a nearly empty bus during an off-hour with no one waiting at the designated stops and he'll go smashing down the avenue, pupils dilated, a convulsive hum bubbling up from his throat, Softly opening his eyes, the great painted van careening down on stray dogs, derelicts, children, an interior point system in effect.
The Pollinators had also been left in his care, and during what he had come to think of as off-hours he worked at renewing his friendship with Max and Miriya Sterling.
The reduced costs of our off-hour drinkin' are a real boon on the scut wages the army is payin' us, and the Deveel sure had the right of it when he said his sushi bar was a happy huntin' grounds when it came to broads.