| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | difficult [to-vb] [coord] the [noun] | 15 |
|
| 2 | difficult [to-vb] [coord] the [noun] | 15 |
|
| 3 | difficult [to-vb] and the [noun] | 11 |
|
| 4 | difficult [to-vb] [coord] the [noun sg] | 10 |
|
| 5 | difficult [to-vb] [coord] the [noun pl] | 5 |
|
