| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [noun sg] [prep] time | 16 |
|
| 2 | at a [noun sg] [prep] time | 15 |
|
| 3 | at a [noun sg] in time | 14 |
|
| 4 | at a point [prep] time | 12 |
|
