| between a first speed | 9 | other |
| by using a variable frequency drive | 7 | manner |
| at 0.5% increments | 4 | other |
| speed → be → varied | 52 |
| speed → be → adapted | 3 |
| negative | neutral | positive |
| 0.057 | 0.816 | 0.127 |
| Raw frequency | 55 |
| Normalized frequency | 0.800 |
| Modifier score | 0.500 |
| Perplexity | 114.577 |