| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at once [prep] a | 50 |
|
| 2 | at once [prep] a | 50 |
|
| 3 | at once to [art] | 35 |
|
| 4 | at [adv] to a | 27 |
|
| 5 | at [adv] to a | 24 |
|
| 6 | [prep] once to a | 7 |
|
| 7 | at once to a | 7 |
|
| 8 | at once to a | 7 |
|
| 9 | [prep] once to a | 7 |
|
| 10 | at once to a | 7 |
|
