| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [adv] at a [noun] | 94 |
|
| 2 | [v-ing] [adv] at a [noun sg] | 91 |
|
| 3 | [v-ing] [adv] at [art] time | 40 |
|
| 4 | [v-ing] [adv] at [art] time | 40 |
|
| 5 | [verb] [adv] at a time | 38 |
|
| 6 | [v-ing] [adv] [prep] a time | 13 |
|
| 7 | [v-ing] [adv] [prep] a time | 13 |
|
| 8 | [v-ing] [adv] at a time | 6 |
|
| 9 | [v-ing] [adv] at a time | 6 |
|
| 10 | [v-ing] [adv] at a time | 6 |
|
