| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] or [adv] [adv] | 600 |
|
| 2 | once [conj] [adv] [adv] | 42 |
|
| 3 | once [coord] [adv] [adv] | 42 |
|
| 4 | once or [adv] [adv] | 27 |
|
