| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] it [be] difficult [verb] | 551 |
|
| 2 | [conj] it [be] difficult [to-vb] | 549 |
|
| 3 | [conj] it [be] [adj] to get | 135 |
|
| 4 | [conj] [pron] [be] difficult to get | 17 |
|
| 5 | [conj] it [be] difficult get | 16 |
|
