| away from contaminated atmospheres | 4 | transitive-object |
| often | 3 | temporal |
| in pneumatic systems | 3 | location |
| filter → be kept → dry | 7 |
| filter → be used to keep → dry | 3 |
| filter → keep → dry | 3 |
| negative | neutral | positive |
| 0.174 | 0.632 | 0.195 |
| Raw frequency | 13 |
| Normalized frequency | 0.243 |
| Modifier score | 0.720 |
| Perplexity | 311.019 |