| regularly | 6 | degree |
| least once a year | 5 | temporal |
| annually | 3 | temporal |
| heat pump → be → serviced | 21 |
| heat pump → need → service | 8 |
| heat pump → need → servicing | 3 |
| negative | neutral | positive |
| 0.202 | 0.674 | 0.124 |
| Raw frequency | 32 |
| Normalized frequency | 0.462 |
| Modifier score | 0.843 |
| Perplexity | 235.990 |