| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] it so happen that | 7 |
|
| 2 | [subord] it so [verb] that | 7 |
|
| 3 | [subord] it so happens that | 5 |
|
| 4 | [subord] it so [vb -s] that | 5 |
|
