| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [art] time when | 1985 |
|
| 2 | [prep] [art] time when | 1985 |
|
| 3 | [prep] a [noun] when | 1790 |
|
| 4 | [prep] a time [adv] | 1517 |
|
| 5 | [prep] a time when | 1443 |
|
