| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | difficult [to-vb] the [noun] | 613 |
|
| 2 | [to-vb] [coord] the [noun] | 523 |
|
| 3 | difficult [to-vb] [coord] the | 24 |
|
| 4 | difficult [to-vb] [coord] [noun] | 15 |
|
| 5 | difficult [coord] the [noun] | 12 |
|
