| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who at [adj] time | 50 |
|
| 2 | who at [det] time | 35 |
|
| 3 | who at that time | 24 |
|
| 4 | who at that time | 24 |
|
| 5 | who at one time | 15 |
|
| 6 | who at [num] time | 15 |
|
| 7 | who at one time | 15 |
|
