| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] a [noun] | 5735 |
|
| 2 | have once [been] a | 92 |
|
| 3 | once [been] a [noun] | 59 |
|
| 4 | have once [been] [noun] | 40 |
|
