| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [adv] a | 1376 |
|
| 2 | at [adv] a | 1223 |
|
| 3 | at least a | 1183 |
|
| 4 | at least a | 1183 |
|
| 5 | at [adv] an | 165 |
|
| 6 | at once a | 65 |
|
| 7 | at once a | 65 |
|
| 8 | at quite a | 25 |
|
| 9 | at quite a | 25 |
|
| 10 | at only a | 20 |
|
| 11 | at only a | 20 |
|
| 12 | at about a | 15 |
|
| 13 | at about a | 15 |
|
| 14 | at both a | 11 |
|
| 15 | at just a | 11 |
|
| 16 | at both a | 11 |
|
| 17 | at just a | 11 |
|
| 18 | at [Wh adv] a | 10 |
|
| 19 | at how a | 8 |
|
| 20 | at how a | 8 |
|
| 21 | at perhaps a | 5 |
|
| 22 | at either a | 5 |
|
| 23 | at around a | 5 |
|
| 24 | at either a | 5 |
|
| 25 | at around a | 5 |
|
| 26 | at perhaps a | 5 |
|
