| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [prep] the time [Wh adv] | 12 |
|
| 2 | [vb past] [prep] the time when | 11 |
|
| 3 | [vb past] at the time [Wh adv] | 7 |
|
