| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] it difficult | 1488 |
|
| 2 | made it [adj] | 1387 |
|
| 3 | make it difficult | 533 |
|
| 4 | [vb past] it difficult | 376 |
|
| 5 | made [pron] difficult | 113 |
|
