| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | ever happened [prep] | 30 |
|
| 2 | ever happened to | 20 |
|
| 3 | ever happened to | 20 |
|
| 4 | ever happened in | 7 |
|
| 5 | ever happened in | 7 |
|
