| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at an [adj] | 2276 |
|
| 2 | at [art] [adj -er] | 1898 |
|
| 3 | at [art] [adj -er] | 1898 |
|
| 4 | at a [adj -er] | 1375 |
|
| 5 | [prep] an [adj -er] | 1070 |
|
| 6 | [prep] an [adj -er] | 1070 |
|
| 7 | at an [adj -er] | 148 |
|
