| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun] | 490659 |
|
| 2 | [prep] [noun] [Wh det] | 22741 |
|
| 3 | a [noun] [Wh det] | 20335 |
|
| 4 | [prep] a [Wh det] | 33 |
|
