| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adv] a [noun] | 3372 |
|
| 2 | at [adv] a [noun] | 751 |
|
| 3 | [prep] at [adv] a | 311 |
|
| 4 | [prep] at [adv] [noun] | 269 |
|
| 5 | [prep] at a [noun] | 29 |
|
