| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | doubt [subord] to the [noun] [unc] | 5 |
|
| 2 | doubt [subord] to [art] [noun] [unc] | 5 |
|
| 3 | doubt as to [art] [noun] [unc] | 5 |
|
| 4 | doubt [subord] to [art] [noun] ['s] | 5 |
|
