| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult to find a | 18 |
|
| 2 | [adv] difficult to find a | 17 |
|
| 3 | [adv] difficult to find a | 13 |
|
| 4 | very difficult to find a | 6 |
|
| 5 | very difficult to find a | 6 |
|
| 6 | [adv] difficult to find an | 5 |
|
