| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] difficult [verb] [noun] | 169 |
|
| 2 | it [be] [verb] [noun] for | 44 |
|
| 3 | it [be] difficult [verb] for | 14 |
|
| 4 | [be] difficult [verb] [noun] for | 7 |
|
