| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] once [prep] a | 11 |
|
| 2 | [noun] once upon a | 9 |
|
| 3 | [noun pl] [adv] upon a | 6 |
|
| 4 | [noun pl] [adv] upon a | 6 |
|
| 5 | [noun pl] once upon [art] | 5 |
|
| 6 | [noun pl] once upon a | 5 |
|
