| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at once [prep] a | 50 |
|
| 2 | at once [prep] a | 50 |
|
| 3 | at [adv] in a | 32 |
|
| 4 | at [adv] in a | 32 |
|
| 5 | at once in [art] | 17 |
|
| 6 | [prep] once in a | 14 |
|
| 7 | [prep] once in a | 14 |
|
| 8 | at once in a | 9 |
|
| 9 | at once in a | 9 |
|
| 10 | at once in a | 9 |
|
