| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | can be [adv] difficult for | 13 |
|
| 2 | can be [adv] difficult for | 13 |
|
| 3 | can be [adv] difficult for | 13 |
|
| 4 | can be very difficult for | 6 |
|
| 5 | can be very difficult for | 6 |
|
