| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it often happen that [art] | 11 |
|
| 2 | it often happen that [art] | 11 |
|
| 3 | it often happen that [art] | 11 |
|
| 4 | it often happens that [art] | 11 |
|
| 5 | it often happen that [art] | 11 |
|
| 6 | it often happen that the | 7 |
|
| 7 | it often happen that the | 7 |
|
