| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [noun] [noun] [conj] | 224 |
|
| 2 | [prep] a [noun pl] [noun] [conj] | 168 |
|
| 3 | [prep] a [noun pl] [noun] [conj] | 168 |
|
| 4 | at [art] [noun pl] [noun] [conj] | 51 |
|
| 5 | at a [noun pl] [noun] [conj] | 7 |
|
