| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] a [adv] [prep] a time | 9 |
|
| 2 | [verb] a [adv] [prep] a time | 6 |
|
| 3 | [noun sg] a [adv] [prep] a time | 6 |
|
| 4 | a [adv] [prep] a time [conj] | 5 |
|
