| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | once upon a [noun] | 163 |
|
| 2 | [noun pl] once a [noun] | 62 |
|
| 3 | [noun pl] upon a [noun] | 27 |
|
| 4 | [noun pl] once upon a | 5 |
|
