| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [prep] a time [adv] [art] | 21 |
|
| 2 | [adv] [prep] a time [Wh adv] [art] | 21 |
|
| 3 | [adv] [prep] a time when [art] | 21 |
|
| 4 | [adv] [prep] a time when [art] | 21 |
|
| 5 | [adv] [prep] a time [prep] [art] | 6 |
|
| 6 | [adv] [prep] a time [prep] [art] | 6 |
|
| 7 | [adv] [prep] a time [art] [noun] | 9 |
|
| 8 | [adv] [prep] a time [art] [noun sg] | 8 |
|
