| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [adv] [prep] a | 1317 |
|
| 2 | [was/were] [adv] [prep] a | 817 |
|
| 3 | [was/were] once [prep] [art] | 32 |
|
| 4 | [be] once [prep] a | 13 |
|
| 5 | [was/were] once [prep] a | 10 |
|
| 6 | [was/were] once [prep] a | 10 |
|
