| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [prep] [prep] | 1496 |
|
| 2 | [vb past] [prep] once | 448 |
|
| 3 | [prep] once [prep] | 348 |
|
| 4 | [vb past] once [prep] | 70 |
|
