| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adv] [prep] a [noun] | 125 |
|
| 2 | at [adv] [prep] a [noun sg] | 121 |
|
| 3 | at [adv] [prep] [art] time | 72 |
|
| 4 | at [adv] [prep] [art] time | 72 |
|
| 5 | [prep] [adv] [prep] a time | 21 |
|
| 6 | at [adv] [prep] a time | 16 |
|
| 7 | at [adv] [prep] a time | 16 |
|
| 8 | at [adv] [prep] a time | 16 |
|
