| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] and [adv] difficult | 13 |
|
| 2 | [det] and [adv] difficult | 13 |
|
| 3 | [det] and [adv] difficult | 12 |
|
| 4 | [det] and more difficult | 11 |
|
| 5 | [det] and more difficult | 11 |
|
| 6 | more and [adv] difficult | 10 |
|
