| at night | 15 | temporal |
| from the pineal gland | 5 | location |
| during the sleep cycle | 5 | temporal |
| melatonin → be → released | 82 |
| melatonin → be released in → response | 9 |
| melatonin → be released in → the body | 4 |
| negative | neutral | positive |
| 0.123 | 0.691 | 0.186 |
| Raw frequency | 95 |
| Normalized frequency | 0.601 |
| Modifier score | 1.000 |
| Perplexity | 33.024 |