| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| theories about sleep duration | 0.2 | 0.3 | 593 | 92 | 29 |
| theories | 0.15 | 0.8 | 5284 | 48 | 8 |
| about | 0.03 | 0.6 | 9616 | 73 | 5 |
| sleep | 0.36 | 0.7 | 7803 | 92 | 5 |
| duration | 0.55 | 0.4 | 9567 | 14 | 8 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| theories about sleep duration | 0.38 | 0.5 | 9943 | 64 |
| theory about sleep duration | 0.94 | 0.7 | 2194 | 15 |
| theories of sleep psychology | 0.56 | 0.2 | 2210 | 71 |
| what are the evolutionary theories of sleep | 0.4 | 0.3 | 1783 | 90 |
| what theories explain the function of sleep | 1.62 | 0.6 | 2380 | 83 |
| theories about why we sleep | 1.9 | 0.4 | 3897 | 19 |
| what are the two major sleep theories | 0.9 | 0.9 | 4227 | 56 |
| research about sleep duration | 1.1 | 0.8 | 2415 | 27 |
| two theories explaining the purpose of sleep | 0.04 | 0.1 | 7831 | 59 |
| evolution theory of sleep | 0.82 | 1 | 4122 | 37 |
| three day sleep theory | 1.17 | 0.1 | 9626 | 61 |
| purpose of sleep theories | 0.56 | 0.2 | 8481 | 26 |
| evolutionary theory of sleep psychology | 0.04 | 0.7 | 4748 | 45 |
| 3 day sleep theory | 0.34 | 0.4 | 6366 | 34 |
| theoretical explanations for why we sleep | 0.87 | 0.4 | 9191 | 50 |
| sleep theory the band | 0.34 | 1 | 922 | 3 |
