| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [prep] a time | 464 |
|
| 2 | once [prep] a [noun] | 416 |
|
| 3 | [adv] [prep] a time | 382 |
|
| 4 | once [prep] [art] time | 161 |
|
| 5 | once [prep] a time | 160 |
|
