| before attempting to clean them | 14 | temporal |
| thoroughly | 12 | degree |
| duct → be → inspected | 20 |
| duct → be → tested | 9 |
| duct → be → checked | 5 |
| negative | neutral | positive |
| 0.252 | 0.659 | 0.089 |
| Raw frequency | 34 |
| Normalized frequency | 0.459 |
| Modifier score | 0.900 |
| Perplexity | 320.166 |