| sleep deprivation | 7.50 | So much for sleep deprivation. | ||
| sleep disorder | 5.40 | Sleep disorders are rampant among the elderly. | ||
| sleep pattern | 3.16 | - Altered sleep patterns. | ||
| sleep problem | 2.63 | Within a few days, sleep problems are cured. | ||
| sleep disturbance | 1.84 | Many older people are plagued by sleep disturbances. | ||
| sleep aid | 1.45 | Or insomniacs looking for a surefire sleep aid. | ||
| sleep researcher | 1.25 | Already, sleep researchers are incorporating the news into their lives. | ||
| sleep cycle | 0.99 | Different sleep cycles were tried. | ||
| sleep expert | 0.92 | Yet, sleep experts seem cautiously impressed. | ||
| sleep paralysis | 0.92 | So what is sleep paralysis? | ||
| sleep mode | 0.86 | If you are not using your computer, put it in the sleep mode. | ||
| sleep laboratory | 0.72 | Two nights in a sleep laboratory revealed the problem. | ||
| sleep specialist | 0.72 | Bad idea, sleep specialists say. | ||
| sleep study | 0.72 | Sleep lab studies suggest links between ADHD and sleep problems. | ||
| sleep clinic | 0.59 | Many hospitals now have sleep clinics. | ||
| sleep habit | 0.59 | Many people simply develop bad sleep habits. | ||
| sleep loss | 0.59 | The sleep loss was unnecessary. | ||
| sleep experiment | 0.53 | Researchers are conducting sleep experiments on the mission. | ||
| sleep center | 0.46 | THE SLEEP CENTER EXPERIENCE If your sleep problems persist, turn to the nearest sleep center. | ||
| sleep medication | 0.46 | Some sleep medications accumulate in the body and cause a hangover feeling the next day. |