| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it happen one [noun] | 8 |
|
| 2 | it happen one [noun sg] | 8 |
|
| 3 | it happened one [noun] | 7 |
|
| 4 | it happen one night | 5 |
|
| 5 | it happen one night | 5 |
|
