| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [coord] [adv] | 1227 |
|
| 2 | once [coord] [adv] | 541 |
|
| 3 | [v-ing] once [adv] | 113 |
|
| 4 | [v-ing] once [coord] | 29 |
|
