| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | how [adv] could | 71 |
|
| 2 | how [adv] could | 70 |
|
| 3 | how then [vb mod] | 38 |
|
| 4 | how then [modal v] | 38 |
|
| 5 | [adv] then could | 30 |
|
| 6 | how then could | 9 |
|
| 7 | how then could | 9 |
|
