| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult [verb] [pron] | 251 |
|
| 2 | [adv] difficult [to-vb] [pron] | 246 |
|
| 3 | [adv] [adj] to say [pron] | 131 |
|
| 4 | [adv] difficult say [pron] | 9 |
|
