| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what extent [modal v] | 59 |
|
| 2 | what [modal v] [noun pl] | 36 |
|
| 3 | what extent [noun pl] | 16 |
|
| 4 | extent [modal v] [noun pl] | 9 |
|
