| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] it [verb] [prep] | 1963 |
|
| 2 | [adv] it [vb past] [prep] | 798 |
|
| 3 | [adv] [pron] happened [prep] | 141 |
|
| 4 | [adv] [pers pn] happened [prep] | 28 |
|
| 5 | [adv] it happen [prep] | 21 |
|
| 6 | [adv] it happened [prep] | 9 |
|
