| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [adj] time | 433 |
|
| 2 | [to-vb] at a [adj] | 346 |
|
| 3 | [to-vb] a [adj] time | 174 |
|
| 4 | [to-vb] at [adj] time | 74 |
|
| 5 | [to-vb] at a time | 18 |
|
