| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [adj] time | 433 |
|
| 2 | a [adj] time and | 341 |
|
| 3 | at [adj] time and | 196 |
|
| 4 | at a [adj] and | 153 |
|
| 5 | at a time and | 98 |
|
