Wiktionary
n. A pattern of sleeping and waking; especially a regular pattern of sleeping and waking designed to promote health
Usage examples of "sleep schedule".
Kare drew a deep breath, but before he could deliver yet another homily on the desirability of something resembling a normal sleep schedule, the younger scientist hurried on.
I also knew that the hours he'd been keeping for the past week were so far off his normal wake-sleep schedule that by now he was probably a nervous, jabbering mess from trying to keep up with a gang of wild gringos fueled from an apparently bottomless satchel full of speed, acid, MDA and cocaine.
Besides, she had done much worse things to her sleep schedule during residency and so she didn't mind getting up early to do something she felt good about.
If we go back at a time that conflicts with your own sleep schedule, then you and Harriet will be inefficient.
Then we can return to the German lines in the morning, with our sleep schedule matching their time zone.