| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [vb past] a [noun sg] | 25121 |
|
| 2 | once [vb past] a [noun sg] | 152 |
|
| 3 | once [pron] [vb past] a | 17 |
|
| 4 | once [pron] [vb past] [noun sg] | 6 |
|
