| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which at [det] time | 38 |
|
| 2 | which at that time | 36 |
|
| 3 | which at that time | 36 |
|
| 4 | which at [num] time | 26 |
|
| 5 | which at one time | 26 |
|
| 6 | which at one time | 26 |
|
