| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at about the [adj] time | 136 |
|
| 2 | at about the [adj] time | 136 |
|
| 3 | at about the same time | 133 |
|
| 4 | at about the [det] time | 133 |
|
| 5 | at about the same time | 133 |
|
