| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at once [prep] | 278 |
|
| 2 | at once [prep] | 278 |
|
| 3 | at [adv] by | 128 |
|
| 4 | at [adv] by | 124 |
|
| 5 | [prep] once by | 32 |
|
| 6 | [prep] once by | 32 |
|
| 7 | at once by | 30 |
|
| 8 | at once by | 30 |
|
| 9 | at once by | 30 |
|
