| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] is difficult for | 140 |
|
| 2 | [pers pn] is for [pers pn] | 116 |
|
| 3 | [pers pn] difficult for [pers pn] | 75 |
|
| 4 | is difficult for [pers pn] | 55 |
|
