| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult [verb] | 3637 |
|
| 2 | [adv] difficult [to-vb] | 3607 |
|
| 3 | [adv] [adj] to say | 863 |
|
| 4 | [adv] difficult say | 45 |
|
