| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] happen [prep] | 2328 |
|
| 2 | [adv] happen [prep] | 836 |
|
| 3 | [Wh det] [adv] happen | 337 |
|
| 4 | [Wh det] [adv] [prep] | 158 |
|
