| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun prp] at a | 483 |
|
| 2 | at a [noun pl] | 172 |
|
| 3 | [noun prp] at [noun pl] | 156 |
|
| 4 | [noun prp] a [noun pl] | 12 |
|
