| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [adv] happens that | 75 |
|
| 2 | it often [verb] that | 34 |
|
| 3 | it often [vb -s] that | 29 |
|
| 4 | it often happens [conj] | 24 |
|
| 5 | it often happens that | 24 |
|
| 6 | it often happens [that] | 24 |
|
| 7 | it often happen that | 24 |
|
| 8 | [pron] often happens that | 24 |
|
