| very | 12 | degree |
| for 25% of the population | 6 | transitive-object |
| often | 5 | degree |
| level → be → difficult | 32 |
| level → be → challenging | 14 |
| level → be → hard | 12 |
| level → be → tough | 7 |
| negative | neutral | positive |
| 0.352 | 0.402 | 0.246 |
| Raw frequency | 65 |
| Normalized frequency | 0.548 |
| Modifier score | 0.456 |
| Perplexity | 306.126 |