| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] once [prep] a | 28 |
|
| 2 | [noun] [prep] once [prep] a | 13 |
|
| 3 | [vb pp] [prep] once [prep] a | 10 |
|
| 4 | [vb past] [prep] once [prep] a | 9 |
|
| 5 | [noun sg] [prep] once [prep] a | 6 |
|
| 6 | [noun pl] [prep] once [prep] a | 5 |
|
| 7 | [adv] [prep] once [prep] a | 5 |
|
| 8 | [prep] [pron] once [prep] a | 7 |
|
| 9 | [prep] [noun] once [prep] a | 6 |
|
| 10 | [prep] [pers pn] once [prep] a | 6 |
|
| 11 | [prep] [adv] once [prep] a | 5 |
|
| 12 | [prep] [adv] once [prep] a | 5 |
|
| 13 | [prep] least once [prep] a | 5 |
|
| 14 | [prep] least once [prep] a | 5 |
|
| 15 | [prep] once [verb] [prep] a | 10 |
|
| 16 | [prep] once [vb pp] [prep] a | 8 |
|
| 17 | [prep] once [prep] a [noun sg] | 30 |
|
| 18 | [prep] once [prep] a [noun] | 30 |
|
| 19 | [prep] once [prep] a [adj] | 24 |
|
| 20 | [prep] once [prep] a [adj] | 23 |
|
