| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] once [conj] twice a | 17 |
|
| 2 | [adv] once [coord] [adv] a | 17 |
|
| 3 | [adv] once [conj] [adv] a | 17 |
|
| 4 | [adv] once or [adv] a | 17 |
|
| 5 | [adv] once [conj] [adv] a | 17 |
|
| 6 | [adv] once or [adv] a | 17 |
|
| 7 | [adv] once [conj] [adv] a | 15 |
|
| 8 | only once [conj] [adv] a | 6 |
|
| 9 | only once [conj] [adv] a | 6 |
|
