| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] it difficult [to-vb] [noun] | 23 |
|
| 2 | find it difficult [to-vb] [noun] | 19 |
|
| 3 | [vb infin] it difficult [to-vb] [noun sg] | 10 |
|
| 4 | [vb infin] it difficult [to-vb] [noun pl] | 9 |
|
