| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] [prep] once [art] | 24 |
|
| 2 | and [prep] once [art] | 20 |
|
| 3 | [coord] [prep] once the | 19 |
|
| 4 | [coord] [prep] once the | 19 |
|
| 5 | [coord] for once [art] | 13 |
|
| 6 | [coord] at once [art] | 11 |
|
