| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [adj] time | 433 |
|
| 2 | a [adj] time [subord] | 411 |
|
| 3 | at [adj] time [subord] | 140 |
|
| 4 | at a time [subord] | 49 |
|
| 5 | at a [adj] [subord] | 7 |
|
