| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | once [coord] [adv] | 541 |
|
| 2 | [subord] [coord] [adv] | 164 |
|
| 3 | [subord] once [adv] | 71 |
|
| 4 | [subord] once [coord] | 17 |
|
