| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a time when [noun sg] | 145 |
|
| 2 | at a time when [noun prp] | 101 |
|
| 3 | at a time when [noun pl] | 96 |
|
| 4 | at a time when britain | 8 |
|
| 5 | at a time when britain | 8 |
|
| 6 | at a time when [n mass] | 8 |
|
| 7 | at a time when government | 5 |
|
