| in order to ensure flawless operation | 7 | purpose |
| often | 6 | temporal |
| without changing existing piping | 5 | manner |
| valve → be → replaced | 275 |
| valve → need replacing in → the event | 5 |
| valve → be replaced in → case | 4 |
| negative | neutral | positive |
| 0.494 | 0.457 | 0.049 |
| Raw frequency | 284 |
| Normalized frequency | 0.684 |
| Modifier score | 0.800 |
| Perplexity | 227.867 |