| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] once [art] [noun sg] [prep] | 12 |
|
| 2 | [vb base] once a [noun sg] [prep] | 9 |
|
| 3 | [vb base] once a [noun sg] [prep] | 9 |
|
