| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] extent [vb mod] [art] [noun] | 11 |
|
| 2 | what extent [modal v] [art] [noun] | 11 |
|
| 3 | [Wh det] extent [modal v] the [noun] | 10 |
|
| 4 | [Wh det] extent [modal v] [art] [noun sg] | 8 |
|
