| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] difficult [pron] is for | 20 |
|
| 2 | how difficult [pron] is for | 17 |
|
| 3 | how difficult [pron] is for | 17 |
|
| 4 | [Wh adv] difficult [pron] is for | 17 |
|
| 5 | difficult [pron] is for [noun] | 11 |
|
| 6 | difficult [pron] is for [noun pl] | 8 |
|
