| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | difficult one for | 13 |
|
| 2 | difficult [pron] for | 13 |
|
| 3 | difficult [pron] for | 13 |
|
| 4 | difficult [indef pn] for | 13 |
|
| 5 | difficult one for | 13 |
|
