| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | once [prep] | 2142 |
|
| 2 | once [prep] | 2142 |
|
| 3 | [adv] upon | 1516 |
|
| 4 | [adv] upon | 1153 |
|
| 5 | once upon | 166 |
|
| 6 | once upon | 166 |
|
