| intentionally | 7 | manner |
| more slowly | 5 | manner |
| in order to increase selectivity | 5 | purpose |
| gas → be → added | 51 |
| gas → be introduced into → gas portion | 3 |
| negative | neutral | positive |
| 0.183 | 0.730 | 0.087 |
| Raw frequency | 54 |
| Normalized frequency | 0.519 |
| Modifier score | 0.415 |
| Perplexity | 151.507 |