| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | so often [verb] | 449 |
|
| 2 | so [adv] [to-vb] | 168 |
|
| 3 | [adv] often [to-vb] | 42 |
|
| 4 | [adv] often [to-vb] | 40 |
|
| 5 | so often [to-vb] | 17 |
|
