| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [verb] on | 1577 |
|
| 2 | [pron] happen on | 143 |
|
| 3 | which happen [prep] | 129 |
|
| 4 | [Wh det] happen on | 98 |
|
| 5 | which happen on | 12 |
|
