| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [adv] [adv] [conj] | 816 |
|
| 2 | [is] [adv] [adv] difficult | 311 |
|
| 3 | [adv] [adv] difficult [conj] | 148 |
|
| 4 | [is] [adv] difficult [conj] | 134 |
|
| 5 | [is] [adv] difficult [conj] | 123 |
|
