| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] once by a | 8 |
|
| 2 | [prep] once by a | 8 |
|
| 3 | at once by a | 6 |
|
| 4 | at once by a | 6 |
|
| 5 | once [verb] by a | 23 |
|
| 6 | once [vb pp] by a | 23 |
|
| 7 | once owned by a | 7 |
|
| 8 | once own by a | 7 |
|
| 9 | once by a [noun] | 9 |
|
| 10 | once by a [noun sg] | 8 |
|
| 11 | once by a [adj] | 6 |
|
| 12 | once by a [adj] | 6 |
|
