| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | make it difficult | 533 |
|
| 2 | makes it difficult | 148 |
|
| 3 | made it difficult | 109 |
|
| 4 | making it difficult | 91 |
|
| 5 | make it difficult | 71 |
|
| 6 | make it difficult | 64 |
|
| 7 | to make it difficult | 25 |
|
| 8 | made it difficult | 25 |
|
