| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] to [art] | 9910 |
|
| 2 | to [art] problem | 1004 |
|
| 3 | [vb base] [art] problem | 739 |
|
| 4 | [vb base] to problem | 12 |
|
