| for short-term use | 19 | purpose |
| for children | 17 | transitive-object |
| generally | 16 | degree |
| melatonin → be → safe | 125 |
| melatonin → be considered → safe | 18 |
| melatonin → be shown to be → safe | 6 |
| melatonin → be safe to → use | 6 |
| negative | neutral | positive |
| 0.123 | 0.389 | 0.489 |
| Raw frequency | 155 |
| Normalized frequency | 0.687 |
| Modifier score | 0.900 |
| Perplexity | 56.544 |