| very | 61 | degree |
| for students | 26 | transitive-object |
| for them | 25 | transitive-object |
| learning → be → difficult | 476 |
| learning → be → tricky | 21 |
| learning → be → difficult task | 20 |
| learning → be → difficult thing | 5 |
| learning → be → difficult process | 4 |
| learning → be → difficult challenge | 3 |
| learning → be → difficult endeavor | 3 |
| negative | neutral | positive |
| 0.505 | 0.336 | 0.160 |
| Raw frequency | 532 |
| Normalized frequency | 0.718 |
| Modifier score | 0.678 |
| Perplexity | 32.894 |