| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it often [verb] that [art] | 16 |
|
| 2 | it often [vb -s] that [art] | 13 |
|
| 3 | it often [verb] that the | 12 |
|
| 4 | it often happen that [art] | 11 |
|
| 5 | it often happens that [art] | 11 |
|
