| to increase their wear resistance | 5 | purpose |
| fairly | 5 | degree |
| frequently | 3 | temporal |
| surface → be → abrasive | 22 |
| surface → be subjected to → abrasive wear | 4 |
| negative | neutral | positive |
| 0.312 | 0.496 | 0.193 |
| Raw frequency | 26 |
| Normalized frequency | 0.320 |
| Modifier score | 0.800 |
| Perplexity | 86.607 |