| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] for [adj] [noun] | 225 |
|
| 2 | difficult for [adj] [noun] | 91 |
|
| 3 | [is] difficult for [noun] | 38 |
|
| 4 | [is] difficult for [adj] | 12 |
|
