| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] [be] at | 553 |
|
| 2 | happen [prep] [be] [prep] | 178 |
|
| 3 | happen [prep] [be] [prep] | 178 |
|
| 4 | happen [prep] [be] at | 15 |
|
| 5 | happen [prep] [be] at | 15 |
|
