| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] at the [adj] time | 27 |
|
| 2 | [prep] at the [det] time | 25 |
|
| 3 | [prep] at the same time | 25 |
|
| 4 | [prep] at the same time | 25 |
|
| 5 | without at the [adj] time | 13 |
|
