| annually | 58 | temporal |
| least once a year | 47 | temporal |
| regularly | 30 | degree |
| boiler → be → serviced | 237 |
| boiler → get → serviced | 3 |
| negative | neutral | positive |
| 0.171 | 0.603 | 0.226 |
| Raw frequency | 240 |
| Normalized frequency | 0.897 |
| Modifier score | 0.869 |
| Perplexity | 277.836 |