| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [adv] once [prep] a | 17 |
|
| 2 | [prep] [adv] once [prep] a | 6 |
|
| 3 | at [adv] once [prep] a | 6 |
|
| 4 | [prep] [adv] once [prep] a | 6 |
|
| 5 | at [adv] once [prep] a | 6 |
|
| 6 | [vb past] [adv] once [prep] a | 5 |
|
| 7 | [adv] [subord] once [prep] a | 11 |
|
| 8 | [adv] than once [prep] a | 11 |
|
| 9 | [adv] than once [prep] a | 11 |
|
| 10 | [adv] [conj] once [prep] a | 11 |
|
| 11 | [adv] [verb] once [prep] a | 7 |
|
| 12 | [adv] at once [prep] a | 6 |
|
| 13 | [adv] [prep] once [prep] a | 6 |
|
| 14 | [adv] at once [prep] a | 6 |
|
| 15 | [adv] [prep] once [prep] a | 6 |
|
| 16 | [adv] once [adv] [prep] a | 9 |
|
| 17 | [adv] once [adv] [prep] a | 9 |
|
| 18 | [adv] once more [prep] a | 8 |
|
| 19 | [adv] once more [prep] a | 8 |
|
| 20 | [adv] once [verb] [prep] a | 6 |
|
| 21 | [adv] once [prep] a [noun] | 32 |
|
| 22 | [adv] once [prep] a [noun sg] | 31 |
|
| 23 | [adv] once [prep] a while | 10 |
|
| 24 | [adv] once [prep] a while | 10 |
|
| 25 | [adv] once [prep] a [adj] | 7 |
|
| 26 | [adv] once [prep] a lifetime | 6 |
|
| 27 | [adv] once [prep] a lifetime | 6 |
|
| 28 | [adv] once [prep] a [adj] | 5 |
|
