| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] what happened to | 85 |
|
| 2 | [prep] what happened to | 85 |
|
| 3 | about what [verb] to | 56 |
|
| 4 | about what happened [prep] | 50 |
|
| 5 | about what happened [prep] | 50 |
|
| 6 | about what happen to | 36 |
|
| 7 | about what [vb past] to | 29 |
|
| 8 | about what happened to | 24 |
|
| 9 | about [Wh det] happened to | 24 |
|
| 10 | about what happened to | 24 |
|
| 11 | about [pron] happened to | 24 |
|
| 12 | about what happened to | 24 |
|
