| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [adv] at a [noun] | 250 |
|
| 2 | [verb] [adv] at a [noun sg] | 238 |
|
| 3 | [verb] [adv] at [art] time | 82 |
|
| 4 | [verb] [adv] [prep] a time | 58 |
|
| 5 | [verb] [adv] [prep] a time | 58 |
|
| 6 | [verb] [adv] at a time | 38 |
|
| 7 | [verb] [adv] at a time | 13 |
|
| 8 | [verb] [adv] at a time | 13 |
|
