| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun] [noun] | 80004 |
|
| 2 | [prep] a [noun] [Wh det] | 7702 |
|
| 3 | [prep] [noun] [noun] [Wh det] | 3751 |
|
| 4 | a [noun] [noun] [Wh det] | 2917 |
|
