| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [prep] [noun sg] | 31020 |
|
| 2 | once [vb past] [prep] | 397 |
|
| 3 | once [prep] [noun sg] | 230 |
|
| 4 | once [vb past] [noun sg] | 47 |
|
