| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] for them | 1283 |
|
| 2 | difficult for [pron] | 542 |
|
| 3 | difficult for [pers pn] | 459 |
|
| 4 | difficult [prep] them | 105 |
|
| 5 | difficult for they | 103 |
|
