| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] what happened to | 41 |
|
| 2 | [conj] what happened to | 41 |
|
| 3 | [coord] what happened to | 34 |
|
| 4 | and what happened to | 19 |
|
| 5 | and what happened to | 19 |
|
| 6 | but what happened to | 13 |
|
| 7 | but what happened to | 13 |
|
