| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [noun] | 16739 |
|
| 2 | [noun pl] at [noun] | 14849 |
|
| 3 | [noun pl] a [noun] | 9681 |
|
| 4 | [noun pl] at a | 2805 |
|
