| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [adv] a | 2200 |
|
| 2 | [adv] upon a | 193 |
|
| 3 | [vb past] [adv] upon | 130 |
|
| 4 | [vb past] upon a | 106 |
|
