| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] what happened [prep] the | 72 |
|
| 2 | [prep] what happened [prep] the | 72 |
|
| 3 | [prep] what [verb] at the | 17 |
|
| 4 | [prep] what happen at the | 14 |
|
| 5 | [prep] what [vb past] at the | 9 |
|
| 6 | [prep] what happened at the | 8 |
|
| 7 | [prep] what happened at the | 8 |
|
| 8 | [prep] what happened at the | 8 |
|
| 9 | [prep] what happened at the | 8 |
|
| 10 | [prep] what happened at [art] | 8 |
|
| 11 | [prep] what happened at [art] | 8 |
|
| 12 | [prep] [Wh det] happened at the | 8 |
|
| 13 | [prep] [pron] happened at the | 8 |
|
