| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | how it [verb] [conj] | 83 |
|
| 2 | [adv] it happen [conj] | 28 |
|
| 3 | how it happen [conj] | 7 |
|
| 4 | how [pers pn] happen [conj] | 7 |
|
| 5 | how [pron] happen [conj] | 7 |
|
