| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] for [adj] [noun] | 1802 |
|
| 2 | [adv] difficult for [noun] | 168 |
|
| 3 | difficult for [adj] [noun] | 91 |
|
| 4 | [adv] difficult [adj] [noun] | 61 |
|
| 5 | [adv] difficult for [adj] | 53 |
|
