| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | once [prep] a [noun] [noun] | 46 |
|
| 2 | once [prep] a [noun sg] [noun] | 44 |
|
| 3 | [adv] [prep] a time [noun] | 32 |
|
| 4 | [adv] [prep] a time [noun] | 25 |
|
| 5 | once [prep] [art] time [noun] | 14 |
|
| 6 | once [prep] a time [noun] | 14 |
|
| 7 | once [prep] a time [noun] | 14 |
|
| 8 | once [prep] [art] time [noun] | 14 |
|
| 9 | once [prep] a time [noun] | 14 |
|
