| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which happen to be | 52 |
|
| 2 | which happen to be | 52 |
|
| 3 | which happens to be | 22 |
|
| 4 | which happened to be | 17 |
|
| 5 | which happen to be | 13 |
|
