| very | 9 | degree |
| often | 4 | degree |
| to remove by cleaning | 4 | manner |
| bacteria → be → difficult | 23 |
| bacteria → become → more difficult | 4 |
| bacteria → become → difficult | 3 |
| bacteria → be → more difficult | 3 |
| negative | neutral | positive |
| 0.754 | 0.189 | 0.057 |
| Raw frequency | 33 |
| Normalized frequency | 0.358 |
| Modifier score | 0.580 |
| Perplexity | 311.403 |