| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is difficult for | 139 |
|
| 2 | it is for [pers pn] | 110 |
|
| 3 | it difficult for [pers pn] | 75 |
|
| 4 | is difficult for [pers pn] | 55 |
|
