| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] at a time when [pron] | 9 |
|
| 2 | [pron] at a time [adv] [pron] | 9 |
|
| 3 | [pron] at a time when [pron] | 9 |
|
| 4 | [pron] at a time [Wh adv] [pron] | 9 |
|
