| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh adv] often do we [vb infin] | 9 |
|
| 2 | how often do we [vb infin] | 9 |
|
| 3 | [adv] often do we [vb infin] | 9 |
|
| 4 | how often do we [vb infin] | 9 |
|
