| to detect at the treatment facility | 8 | location |
| very | 7 | degree |
| for former smokers | 2 | transitive-object |
| odor → be → difficult | 22 |
| odor → be → challenge | 3 |
| negative | neutral | positive |
| 0.749 | 0.209 | 0.042 |
| Raw frequency | 25 |
| Normalized frequency | 0.501 |
| Modifier score | 0.000 |
| Perplexity | 60.612 |