| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] at a [noun] when the | 69 |
|
| 2 | [noun sg] at a [noun sg] when the | 69 |
|
| 3 | [noun sg] at a time when the | 65 |
|
| 4 | [noun sg] at a time when the | 65 |
|
