| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [verb] it difficult for [adj] | 7 |
|
| 2 | [noun] [verb] it difficult [prep] [adj] | 6 |
|
| 3 | [noun] make it difficult [prep] [adj] | 6 |
|
| 4 | [noun] [vb -s] it difficult [prep] [adj] | 6 |
|
