| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adv] a [det] | 635 |
|
| 2 | [prep] at [adv] a | 311 |
|
| 3 | [prep] at [adv] [det] | 294 |
|
| 4 | at [adv] a [det] | 49 |
|
