| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult for [det] [noun sg] | 11 |
|
| 2 | [adv] difficult for [det] [noun sg] | 11 |
|
| 3 | [be] difficult for [det] [noun sg] | 8 |
|
| 4 | be difficult for [det] [noun sg] | 8 |
|
| 5 | extremely difficult for [det] [noun sg] | 6 |
|
| 6 | extremely difficult for [det] [noun sg] | 6 |
|
| 7 | difficult [noun] for [det] [noun sg] | 6 |
|
| 8 | difficult [noun sg] for [det] [noun sg] | 6 |
|
| 9 | difficult for [det] [adj] [noun sg] | 10 |
|
| 10 | difficult for [det] [adj] [noun sg] | 10 |
|
| 11 | difficult for [det] [noun sg] [verb] | 13 |
|
| 12 | difficult for [det] [noun sg] [to-vb] | 13 |
|
