| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] at a time when | 426 |
|
| 2 | [verb] at a time when | 226 |
|
| 3 | [noun] [verb] at a time | 98 |
|
| 4 | [noun] [verb] a time when | 6 |
|
