| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [vb pp] a | 8955 |
|
| 2 | [adv] a problem | 292 |
|
| 3 | [vb pp] a problem | 176 |
|
| 4 | [adv] [vb pp] problem | 64 |
|
