| to maximizing equipment life | 10 | purpose |
| around highly aggressive or reactive chemicals | 3 | other |
| lubricant → be → essential | 8 |
| lubricant → be → necessary | 5 |
| lubricant → be → necessity | 3 |
| lubricant → be → important | 3 |
| lubricant → be → required | 3 |
| negative | neutral | positive |
| 0.148 | 0.640 | 0.212 |
| Raw frequency | 22 |
| Normalized frequency | 0.577 |
| Modifier score | 0.900 |
| Perplexity | 66.723 |