| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [noun prp] [prep] a | 390 |
|
| 2 | [noun prp] [prep] a [det] | 165 |
|
| 3 | at [noun prp] [prep] [det] | 136 |
|
| 4 | at [noun prp] a [det] | 16 |
|
