| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [is] for [pron] | 276 |
|
| 2 | it [is] difficult for | 169 |
|
| 3 | [is] difficult for [pron] | 89 |
|
| 4 | it difficult for [pron] | 79 |
|
| 5 | it [is] difficult [pron] | 6 |
|
