The phrase "sleep hours" is correct and usable in written English.
You can use it to refer to the amount of time you spend sleeping. For example, "I should try to get at least eight sleep hours each night."
Sleep hours suffer as well as sleep quality.
Hugh had gone to sleep hours earlier, and it startled me to hear his voice.
Instead, there are a whole host of troubles associated with shortened sleep hours for children from preschool through adolescence.
"This one goes to bed at 11 and that one goes to bed at 2". Sleep hours are a straightforward consideration.
It took into account other lifestyle factors that affect weight, such as smoking, amount of sleep, hours watching television and exercise.
Or, put another way, the feds' confiscation of more than 300 million privately held American sleep hours, taken for eight months without interest payments or a penalty.
A new and growing body of multidisciplinary research shows that strategic renewal — including daytime workouts, short afternoon naps, longer sleep hours, more time away from the office and longer, more frequent vacations — boosts productivity, job performance and, of course, health.
He purposely restricted his subjects to odd numbers of sleep hours -- three, five, seven and nine hours -- so that together the studies would offer a fuller picture of sleep-restriction.
Gradual acceptance of the notion that sequential sleep hours are not essential for high-level job performance has led to increased workplace tolerance for napping and other alternate daily schedules.
A law enforcement official, speaking under the condition of anonymity, told the Associated Press that Dr Conrad Murray gave Jackson propofol to help him sleep hours before his death.
A 10-item questionnaire was administered to assess how tired or energetic the officers generally felt irrespective of sleep hours or workload.
