| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] it difficult [prep] | 39 |
|
| 2 | [vb infin] [pers pn] difficult for | 31 |
|
| 3 | make [pers pn] difficult [prep] | 30 |
|
| 4 | find [pers pn] difficult [prep] | 9 |
|
