| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] [adv] difficult | 1587 |
|
| 2 | it [be] [adv] for | 860 |
|
| 3 | [be] [adv] difficult for | 356 |
|
| 4 | it [be] difficult for | 228 |
|
| 5 | it [adv] difficult for | 165 |
|
