| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | once [prep] a [noun] | 416 |
|
| 2 | once [prep] a [noun sg] | 411 |
|
| 3 | once [prep] a time | 160 |
|
| 4 | once [prep] a time | 160 |
|
| 5 | once [prep] a while | 104 |
|
| 6 | once [prep] a while | 104 |
|
| 7 | once [prep] a [adj] | 75 |
|
| 8 | once [prep] a [adj] | 65 |
|
| 9 | once [prep] a lifetime | 23 |
|
| 10 | once [prep] a lifetime | 23 |
|
| 11 | once [prep] a blue | 16 |
|
| 12 | once [prep] a blue | 16 |
|
| 13 | once [prep] a [num] | 9 |
|
| 14 | once [prep] a hundred | 5 |
|
| 15 | once [prep] a hundred | 5 |
|
| 16 | [prep] once [prep] a | 63 |
|
| 17 | [prep] once [prep] a | 63 |
|
| 18 | at once [prep] a | 50 |
|
| 19 | at once [prep] a | 50 |
|
| 20 | [verb] once [prep] a | 49 |
|
| 21 | [noun] once [prep] a | 44 |
|
| 22 | [adv] once [prep] a | 40 |
|
| 23 | [conj] once [prep] a | 33 |
|
| 24 | [adv] once [prep] a | 31 |
|
| 25 | [noun sg] once [prep] a | 29 |
|
| 26 | [art] once [prep] a | 20 |
|
| 27 | [pron] once [prep] a | 20 |
|
| 28 | [art] once [prep] a | 20 |
|
| 29 | [vb pp] once [prep] a | 17 |
|
| 30 | [pers pn] once [prep] a | 16 |
|
