| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | happen is | 477 |
|
| 2 | happens [is] | 162 |
|
| 3 | happened [is] | 84 |
|
| 4 | happening [is] | 68 |
|
| 5 | happen [is] | 62 |
|
| 6 | to happen [is] | 48 |
|
| 7 | happened [is] | 46 |
|
| 8 | happen [is] | 9 |
|
