| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it difficult [prep] | 255 |
|
| 2 | it difficult for | 217 |
|
| 3 | it difficult for | 217 |
|
| 4 | it difficult to | 23 |
|
| 5 | it difficult to | 23 |
|
| 6 | it difficult in | 7 |
|
| 7 | it difficult in | 7 |
|
| 8 | it difficult at | 6 |
|
| 9 | it difficult at | 6 |
|
