| duct → be used for → heating | 13 |
| duct → be used in → heating | 4 |
| duct → be utilized for → heating | 4 |
| duct → be employed for → heating | 3 |
| duct → be taken for → heating | 3 |
| negative | neutral | positive |
| 0.173 | 0.777 | 0.050 |
| Raw frequency | 27 |
| Normalized frequency | 0.415 |
| Modifier score | 0.500 |
| Perplexity | 90.551 |