| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [adj] time | 380 |
|
| 2 | [vb infin] a [adj] time | 304 |
|
| 3 | [vb infin] at a [adj] | 156 |
|
| 4 | [vb infin] at [adj] time | 139 |
|
| 5 | [vb infin] at a time | 15 |
|
