| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | once [verb] as a | 47 |
|
| 2 | once [vb pp] as a | 37 |
|
| 3 | once [vb past] as a | 9 |
|
| 4 | once [adv] as a | 7 |
|
| 5 | once regarded as a | 6 |
|
| 6 | once used as a | 6 |
|
| 7 | once [adv] as a | 6 |
|
| 8 | once work as a | 6 |
|
| 9 | once use as a | 6 |
|
| 10 | once regard as a | 6 |
|
| 11 | once more as a | 5 |
|
| 12 | once more as a | 5 |
|
| 13 | once as a [noun sg] | 17 |
|
| 14 | once as a [noun] | 17 |
|
