| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [adv] happens that | 75 |
|
| 2 | it so happen that | 72 |
|
| 3 | it [adv] happened that | 49 |
|
| 4 | it often happen that | 24 |
|
| 5 | it just happen that | 12 |
|
| 6 | it sometimes happen that | 7 |
|
