| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] [prep] [art] [noun sg] | 31600 |
|
| 2 | once [prep] [art] [noun sg] | 813 |
|
| 3 | [vb base] once [art] [noun sg] | 42 |
|
| 4 | [vb base] once [prep] [art] | 9 |
|
