| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun] at the time | 593 |
|
| 2 | [vb past] [prep] [noun] at the | 422 |
|
| 3 | [vb past] [noun] at the time | 12 |
|
| 4 | [vb past] [prep] at the time | 6 |
|
