| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [adv] difficult to find | 38 |
|
| 2 | is [adv] difficult find | 29 |
|
| 3 | [is] very difficult find | 13 |
|
| 4 | 's [adv] difficult find | 9 |
|
