| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] [adv] happened to | 37 |
|
| 2 | has [adv] happen to | 23 |
|
| 3 | 's [adv] happen to | 14 |
|
| 4 | [vb -s] ever happen to | 14 |
|
| 5 | [vb -s] never happen to | 9 |
|
