| according to a new study | 12 | other |
| most commonly | 4 | degree |
| to fall asleep | 2 | purpose |
| adult → use → drug | 36 |
| adult → use → the drug | 12 |
| adult → use → substance | 5 |
| adult → use → the substance | 3 |
| negative | neutral | positive |
| 0.493 | 0.439 | 0.068 |
| Raw frequency | 56 |
| Normalized frequency | 0.524 |
| Modifier score | 0.782 |
| Perplexity | 114.866 |