| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun] [Wh adv] [art] | 1514 |
|
| 2 | at a [noun] [Wh adv] | 1503 |
|
| 3 | at a [noun] [art] | 111 |
|
| 4 | at [noun] [Wh adv] [art] | 94 |
|
