| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [adv] [prep] | 21807 |
|
| 2 | [adv] happen [prep] | 1109 |
|
| 3 | [vb -s] happen [prep] | 793 |
|
| 4 | [vb -s] [adv] happen | 481 |
|
