| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is difficult [verb] | 1529 |
|
| 2 | it is [verb] for | 275 |
|
| 3 | it is difficult for | 139 |
|
| 4 | is difficult [verb] for | 16 |
|
| 5 | it difficult [verb] for | 8 |
|
