| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | once been [noun] ['s] | 8 |
|
| 2 | once [been] [noun] ['s] | 8 |
|
| 3 | once [been] [noun] 's | 6 |
|
| 4 | once [been] [noun prp] ['s] | 6 |
|
