| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [adv] [vb past] | 3672 |
|
| 2 | [adv] [vb past] at | 1303 |
|
| 3 | which [vb past] at | 394 |
|
| 4 | which [adv] at | 9 |
|
