| for students | 7 | transitive-object |
| very | 4 | degree |
| for a beginner | 4 | transitive-object |
| textbook → be → difficult | 16 |
| textbook → be → hard | 8 |
| textbook → be → challenge | 4 |
| negative | neutral | positive |
| 0.518 | 0.372 | 0.110 |
| Raw frequency | 28 |
| Normalized frequency | 0.468 |
| Modifier score | 0.733 |
| Perplexity | 192.666 |