| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [det] a | 336 |
|
| 2 | at such a | 263 |
|
| 3 | at such a | 263 |
|
| 4 | at [adj -est] a | 81 |
|
| 5 | at [num ord] a | 64 |
|
| 6 | at best a | 58 |
|
| 7 | at good a | 58 |
|
| 8 | at last a | 41 |
|
| 9 | at last a | 41 |
|
| 10 | at [num] a | 36 |
|
| 11 | at most a | 31 |
|
| 12 | at most a | 31 |
|
| 13 | at worst a | 23 |
|
| 14 | at all a | 23 |
|
| 15 | at first a | 23 |
|
| 16 | at all a | 23 |
|
| 17 | at bad a | 23 |
|
| 18 | at first a | 23 |
|
| 19 | at half a | 7 |
|
| 20 | at half a | 7 |
|
| 21 | at [adj] a | 6 |
|
