| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] upon a [noun sg] | 470 |
|
| 2 | [verb] once a [noun sg] | 190 |
|
| 3 | once upon a [noun sg] | 163 |
|
| 4 | [verb] once upon a | 5 |
|
