| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a time when | 1443 |
|
| 2 | a time when [noun prp] | 125 |
|
| 3 | [prep] a time [noun prp] | 32 |
|
| 4 | [prep] time when [noun prp] | 12 |
|
