| extremely | 18 | degree |
| often | 7 | degree |
| to many | 5 | transitive-object |
| teaching → be → difficult | 117 |
| teaching → be → difficult task | 8 |
| teaching → be → tricky | 6 |
| teaching → be found → difficult | 4 |
| teaching → become → difficult | 3 |
| negative | neutral | positive |
| 0.471 | 0.387 | 0.143 |
| Raw frequency | 138 |
| Normalized frequency | 0.871 |
| Modifier score | 0.617 |
| Perplexity | 31.008 |