| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [prep] [det] time | 851 |
|
| 2 | [vb pp] at [det] time | 451 |
|
| 3 | at [prep] [det] time | 71 |
|
| 4 | [vb pp] at [prep] [det] | 55 |
|
