| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] it happen | 61 |
|
| 2 | [prep] it happening | 30 |
|
| 3 | of it happen | 27 |
|
| 4 | for it happen | 16 |
|
| 5 | [prep] it to happen | 15 |
|
| 6 | [prep] it happened | 8 |
|
| 7 | [prep] it happens | 8 |
|
