| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | extent to which this [noun] | 17 |
|
| 2 | extent to [Wh det] this [noun] | 17 |
|
| 3 | extent to [pron] this [noun] | 17 |
|
| 4 | extent to which this [noun] | 17 |
|
| 5 | extent to [pron] this [noun sg] | 16 |
|
