| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [adj] time | 433 |
|
| 2 | [vb -s] at a [adj] | 232 |
|
| 3 | [vb -s] a [adj] time | 169 |
|
| 4 | [vb -s] at a time | 52 |
|
| 5 | [vb -s] at [adj] time | 40 |
|
