| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [verb] [prep] | 31384 |
|
| 2 | it [v-ing] [prep] | 589 |
|
| 3 | it happen [prep] | 472 |
|
| 4 | [pron] happening [prep] | 51 |
|
| 5 | [pers pn] happening [prep] | 29 |
|
| 6 | it happening [prep] | 28 |
|
| 7 | it happening [prep] | 28 |
|
