| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] at [art] | 15401 |
|
| 2 | while at [art] | 405 |
|
| 3 | [vb pp] while [art] | 188 |
|
| 4 | [vb pp] while at | 13 |
|
