| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [vb infin] at a time | 9 |
|
| 2 | [modal v] [vb infin] at a time | 9 |
|
| 3 | [vb infin] [pron] at a time | 8 |
|
| 4 | [vb infin] one at a time | 6 |
|
| 5 | [vb infin] [noun] at a time | 6 |
|
| 6 | [vb infin] [indef pn] at a time | 6 |
|
| 7 | [vb infin] one at a time | 6 |
|
| 8 | [vb infin] [verb] at a time | 5 |
|
| 9 | [vb infin] at a [adj] time | 6 |
|
| 10 | [vb infin] at a time [adv] | 6 |
|
| 11 | [vb infin] at a time [Wh adv] | 5 |
|
| 12 | [vb infin] at a time when | 5 |
|
| 13 | [vb infin] at a time when | 5 |
|
