| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] at [prep] [art] | 404 |
|
| 2 | [verb] at once [prep] | 150 |
|
| 3 | at once [prep] [art] | 139 |
|
| 4 | [verb] once [prep] [art] | 106 |
|
| 5 | [verb] at once [art] | 34 |
|
