| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] [indef pn] at [art] time | 9 |
|
| 2 | [verb] [prep] one at [art] time | 6 |
|
| 3 | [verb] [prep] [indef pn] at a time | 6 |
|
| 4 | [vb pp] [prep] [indef pn] at [art] time | 5 |
|
