| very | 69 | degree |
| no longer | 36 | temporal |
| relatively | 25 | degree |
| boiler → be → efficient | 213 |
| boiler → be → more efficient | 46 |
| boiler → be → the more efficient | 9 |
| boiler → be → most efficient | 4 |
| negative | neutral | positive |
| 0.087 | 0.326 | 0.587 |
| Raw frequency | 272 |
| Normalized frequency | 0.923 |
| Modifier score | 0.896 |
| Perplexity | 434.872 |