| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | once or [adv] a year | 33 |
|
| 2 | once [coord] [adv] a year | 33 |
|
| 3 | once [coord] twice a year | 33 |
|
| 4 | once [coord] [adv] a year | 33 |
|
| 5 | once [coord] [adv] a year | 33 |
|
