| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] who have once [vb pp] [adv] | 7 |
|
| 2 | [noun] who had once [vb pp] [adv] | 7 |
|
| 3 | [noun sg] who have once [vb pp] [adv] | 5 |
|
| 4 | [noun] who have once [vb pp] [adv] | 5 |
|
