| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adj] time [prep] [art] | 612 |
|
| 2 | a [adj] time [prep] [art] | 351 |
|
| 3 | at a time [prep] [art] | 74 |
|
| 4 | at a [adj] time [prep] | 71 |
|
| 5 | at a [adj] [prep] [art] | 17 |
|
