| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have once been a [noun] [noun] | 6 |
|
| 2 | had once been a [noun] [noun] | 6 |
|
| 3 | [verb] once been a [noun] [noun] | 6 |
|
| 4 | [vb past] once been a [noun] [noun] | 6 |
|
| 5 | once been a [noun] [prep] [noun] | 7 |
|
| 6 | once been a [noun] [prep] [noun] | 7 |
|
