| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | more difficult [subord] | 235 |
|
| 2 | more difficult [noun sg] | 137 |
|
| 3 | more [subord] [noun sg] | 92 |
|
| 4 | difficult [subord] [noun sg] | 22 |
|
