| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at once [that] [adj] | 12 |
|
| 2 | [prep] once [that] [adj] | 12 |
|
| 3 | [prep] once that [adj] | 12 |
|
| 4 | [prep] once [that] [det] | 12 |
|
| 5 | [prep] once [that] this | 9 |
|
| 6 | [prep] once [that] this | 9 |
|
