| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult for them [to-vb] | 28 |
|
| 2 | it difficult for them [to-vb] | 20 |
|
| 3 | it [adv] difficult for them | 13 |
|
| 4 | it [adv] for them [to-vb] | 6 |
|
