| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at the [det] time a | 92 |
|
| 2 | [was/were] at the [det] time | 36 |
|
| 3 | [was/were] at [det] time a | 13 |
|
| 4 | [was/were] at the time a | 7 |
|
