| from the pineal gland | 13 | location |
| at night | 13 | temporal |
| naturally | 11 | manner |
| melatonin → be → secreted | 38 |
| melatonin → be secreted by → the brain | 9 |
| melatonin → be secreted in → response | 9 |
| melatonin → be secreted in → the brain | 5 |
| melatonin → be secreted by → the body | 5 |
| melatonin → be secreted in → the body | 3 |
| negative | neutral | positive |
| 0.129 | 0.724 | 0.147 |
| Raw frequency | 69 |
| Normalized frequency | 0.546 |
| Modifier score | 0.867 |
| Perplexity | 22.982 |