| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | once have been [noun] | 10 |
|
| 2 | once have [been] [noun] | 10 |
|
| 3 | once have [been] [noun] | 9 |
|
| 4 | once have [been] [noun pl] | 5 |
|
