| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | difficult [to-vb] the [adj] [noun] | 175 |
|
| 2 | [to-vb] [coord] the [adj] [noun] | 128 |
|
| 3 | difficult [to-vb] [coord] the [noun] | 15 |
|
| 4 | difficult [to-vb] [coord] [adj] [noun] | 9 |
|
| 5 | difficult [to-vb] [coord] the [adj] | 7 |
|
