| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [to-vb] the [noun] | 16684 |
|
| 2 | difficult [to-vb] [art] [noun] | 852 |
|
| 3 | difficult [to-vb] [art] [noun] | 852 |
|
| 4 | difficult [verb] the [noun] | 616 |
|
| 5 | difficult [to-vb] the [noun] | 613 |
|
