| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [adv] at a [noun] | 45 |
|
| 2 | [conj] [adv] at a [noun sg] | 44 |
|
| 3 | [conj] [adv] at [art] time | 34 |
|
| 4 | [conj] [adv] [prep] a time | 22 |
|
| 5 | [conj] [adv] at a time | 11 |
|
