| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be once [prep] [art] | 36 |
|
| 2 | [be] once [prep] [art] | 36 |
|
| 3 | [was/were] once [prep] [art] | 32 |
|
| 4 | [be] once [prep] the | 23 |
|
| 5 | [be] once [prep] the | 23 |
|
| 6 | was once [prep] [art] | 22 |
|
| 7 | [be] once in [art] | 18 |
|
| 8 | [be] once [prep] a | 13 |
|
| 9 | [be] once [prep] a | 13 |
|
| 10 | were once [prep] [art] | 10 |
|
