| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of [Wh det] have occurred | 11 |
|
| 2 | of [Wh det] [verb] occurred | 11 |
|
| 3 | of what [verb] occurred | 8 |
|
| 4 | of [Wh det] [vb past] occurred | 6 |
|
| 5 | of [Wh det] had occurred | 6 |
|
| 6 | of [Wh det] [vb -s] occurred | 5 |
|
| 7 | of [Wh det] has occurred | 5 |
|
