| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] that [art] [noun sg] | 4288 |
|
| 2 | difficult [to-vb] [art] [noun sg] | 721 |
|
| 3 | difficult [to-vb] that [art] | 88 |
|
| 4 | difficult [to-vb] that [noun sg] | 9 |
|
