| very | 30 | degree |
| for younger children | 10 | transitive-object |
| a bit | 8 | degree |
| track → be → difficult | 137 |
| track → become → difficult | 13 |
| track → prove → difficult | 5 |
| negative | neutral | positive |
| 0.424 | 0.371 | 0.204 |
| Raw frequency | 155 |
| Normalized frequency | 0.667 |
| Modifier score | 0.623 |
| Perplexity | 300.957 |