| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who at [adj] time | 50 |
|
| 2 | [Wh pn] at [det] time | 37 |
|
| 3 | [Wh pn] at that time | 25 |
|
| 4 | [Wh pn] at that time | 25 |
|
| 5 | [Wh pn] at one time | 15 |
|
| 6 | [Wh pn] at one time | 15 |
|
| 7 | [Wh pn] at [num] time | 15 |
|
