| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be difficult to believe that [det] | 11 |
|
| 2 | [be] difficult to believe that [det] | 11 |
|
| 3 | [is] difficult to believe that [det] | 6 |
|
| 4 | is difficult to believe that [det] | 6 |
|
