| very | 8 | degree |
| on components | 2 | other |
| usually | 2 | degree |
| engine → be → tough | 15 |
| engine → be → difficult | 10 |
| engine → be → hard | 10 |
| negative | neutral | positive |
| 0.408 | 0.459 | 0.133 |
| Raw frequency | 35 |
| Normalized frequency | 0.426 |
| Modifier score | 0.800 |
| Perplexity | 363.801 |