| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [adv] difficult it is for | 13 |
|
| 2 | [vb base] [adv] difficult it is for | 7 |
|
| 3 | know [adv] difficult it is for | 5 |
|
| 4 | know [adv] difficult it is for | 5 |
|
| 5 | [adv] difficult it is for [noun] | 9 |
|
| 6 | [adv] difficult it is for [noun pl] | 7 |
|
