| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] once [been] [pron] [noun] | 12 |
|
| 2 | [vb past] once [been] [pron] [noun] | 12 |
|
| 3 | have once [been] [pron] [noun] | 12 |
|
| 4 | had once [been] [pron] [noun] | 11 |
|
