| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] [prep] the time when | 30 |
|
| 2 | [noun pl] at the time when | 9 |
|
| 3 | years [prep] the time when | 7 |
|
| 4 | [noun pl] from the time when | 7 |
|
