| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] once been [noun] [noun] | 8 |
|
| 2 | [verb] once been [noun] [noun] | 8 |
|
| 3 | have once been [noun] [noun] | 8 |
|
| 4 | had once been [noun] [noun] | 8 |
|
| 5 | once been [art] [noun] [noun] | 10 |
|
| 6 | once been [art] [noun] [noun] | 10 |
|
| 7 | once been a [noun] [noun] | 6 |
|
| 8 | once been a [noun] [noun] | 6 |
|
| 9 | once been [noun] [unc] [noun] | 6 |
|
| 10 | once been [noun] ['s] [noun] | 6 |
|
