| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [adj] time | 309 |
|
| 2 | [pron] at a time | 218 |
|
| 3 | [pron] a [adj] time | 217 |
|
| 4 | [pron] at a [adj] | 186 |
|
