| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [to-vb] [pron] at a time | 5 |
|
| 2 | [verb] [to-vb] at a [adj] time | 6 |
|
| 3 | [verb] [to-vb] at a [adj] time | 6 |
|
