| to consume as little energy | 7 | purpose |
| in place | 3 | location |
| better | 2 | degree |
| building → have → system | 32 |
| building → be → system | 7 |
| negative | neutral | positive |
| 0.143 | 0.597 | 0.260 |
| Raw frequency | 39 |
| Normalized frequency | 0.336 |
| Modifier score | 0.867 |
| Perplexity | 430.036 |