| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at once [prep] a | 50 |
|
| 2 | at once [prep] a | 50 |
|
| 3 | at once by [art] | 15 |
|
| 4 | at [adv] by a | 11 |
|
| 5 | at [adv] by a | 11 |
|
| 6 | [prep] once by a | 8 |
|
| 7 | [prep] once by a | 8 |
|
| 8 | at once by a | 6 |
|
| 9 | at once by a | 6 |
|
| 10 | at once by a | 6 |
|
