| Typicality: | 0.582 |
| Saliency: | 0.398 |
| to ensure | 6 | purpose |
| like any mechanical device | 6 | other |
| to perform at peak efficiency | 5 | purpose |
| heat pump → require → regular maintenance | 9 |
| heat pump → need → regular maintenance | 5 |
| heat pump → receive → regular maintenance | 5 |
| heat pump → need → routine maintenance | 4 |
| negative | neutral | positive |
| 0.145 | 0.660 | 0.195 |
| Raw frequency | 23 |
| Normalized frequency | 0.398 |
| Modifier score | 1.000 |
| Perplexity | 121.807 |