| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] to make it harder | 5 |
|
| 2 | to make it harder [prep] | 7 |
|
| 3 | to make it harder for | 7 |
|
| 4 | to make it harder [prep] | 7 |
|
| 5 | to make it harder for | 7 |
|
