| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it difficult for [noun] | 58 |
|
| 2 | it difficult for [noun pl] | 34 |
|
| 3 | it difficult for [noun sg] | 11 |
|
| 4 | it difficult for [n mass] | 7 |
|
| 5 | it difficult for people | 6 |
|
| 6 | it difficult for people | 6 |
|
| 7 | it difficult for [noun prp] | 5 |
|
