| more energy | 5 | degree |
| regardless of slight changes | 5 | other |
| very | 4 | degree |
| change → be → efficient | 48 |
| change → be → more efficient | 21 |
| change → become → more efficient | 5 |
| change → become → efficient | 4 |
| negative | neutral | positive |
| 0.048 | 0.362 | 0.590 |
| Raw frequency | 78 |
| Normalized frequency | 0.369 |
| Modifier score | 0.914 |
| Perplexity | 163.397 |