| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [adj] [prep] | 3901 |
|
| 2 | [pron] difficult [prep] | 262 |
|
| 3 | it difficult [prep] | 255 |
|
| 4 | [pers pn] difficult [prep] | 255 |
|
