| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [prep] about the [det] time | 15 |
|
| 2 | [vb pp] [prep] about the [det] time | 15 |
|
| 3 | [vb pp] at about the [det] time | 15 |
|
| 4 | [vb pp] at about the [det] time | 15 |
|
