| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult to find [art] | 27 |
|
| 2 | [adv] difficult find a | 13 |
|
| 3 | [adv] difficult find the | 10 |
|
| 4 | very difficult find [art] | 8 |
|
| 5 | [adv] difficult find an | 5 |
|
