| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it happen | 2273 |
|
| 2 | it happened | 943 |
|
| 3 | it happens | 800 |
|
| 4 | it happen | 293 |
|
| 5 | it happening | 110 |
|
| 6 | it to happen | 76 |
|
| 7 | it happen | 28 |
|
| 8 | it happened | 23 |
|
