| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] [adv] difficult for | 114 |
|
| 2 | it [adv] difficult for [noun pl] | 26 |
|
| 3 | [is] [adv] difficult for [noun pl] | 24 |
|
| 4 | it [is] difficult for [noun pl] | 21 |
|
| 5 | it [is] [adv] for [noun pl] | 11 |
|
