| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] once that they | 10 |
|
| 2 | at once that they | 10 |
|
| 3 | at once that they | 10 |
|
| 4 | [prep] once that they | 10 |
|
| 5 | once [verb] that they | 5 |
|
| 6 | once that they [be] | 6 |
|
| 7 | once that they be | 6 |
|
