| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [coord] [adv] | 1143 |
|
| 2 | once [coord] [adv] | 541 |
|
| 3 | [vb past] once [adv] | 398 |
|
| 4 | [vb past] once [coord] | 55 |
|
