| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] for any | 632 |
|
| 2 | difficult for [adj] | 219 |
|
| 3 | difficult for [det] | 108 |
|
| 4 | difficult [prep] any | 25 |
|
| 5 | difficult [prep] any | 25 |
|
| 6 | difficult for any | 23 |
|
| 7 | difficult for any | 23 |
|
