| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] [vb past] once [prep] a | 7 |
|
| 2 | [pron] [vb past] once [prep] a | 7 |
|
| 3 | [vb past] [prep] once [prep] a | 9 |
|
| 4 | [vb past] [prep] once [prep] a | 9 |
|
| 5 | [vb past] at once [prep] a | 8 |
|
| 6 | [vb past] at once [prep] a | 8 |
|
| 7 | [vb past] [verb] once [prep] a | 7 |
|
| 8 | [vb past] [vb pp] once [prep] a | 6 |
|
| 9 | [vb past] [pers pn] once [prep] a | 5 |
|
| 10 | [vb past] [pron] once [prep] a | 5 |
|
| 11 | [vb past] [adv] once [prep] a | 5 |
|
| 12 | [vb past] once [verb] [prep] a | 26 |
|
| 13 | [vb past] once [vb pp] [prep] a | 24 |
|
| 14 | [vb past] once [prep] a [noun sg] | 12 |
|
| 15 | [vb past] once [prep] a [noun] | 12 |
|
