| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] once [coord] [adv] | 33 |
|
| 2 | at once [coord] [adv] | 21 |
|
| 3 | at once [coord] [adv] | 21 |
|
| 4 | [prep] once and [adv] | 18 |
|
| 5 | [prep] once or [adv] | 12 |
|
| 6 | [prep] once [coord] twice | 11 |
|
| 7 | to once [coord] [adv] | 5 |
|
| 8 | to once [coord] [adv] | 5 |
|
