| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [prep] [art] time | 602 |
|
| 2 | [vb past] at [art] time | 398 |
|
| 3 | [prep] at [art] time | 45 |
|
| 4 | [vb past] [prep] at [art] | 27 |
|
