| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [adj] | 10976 |
|
| 2 | at a [adj -er] | 1375 |
|
| 3 | [prep] a lower | 513 |
|
| 4 | [prep] a lower | 513 |
|
| 5 | at [art] lower | 397 |
|
| 6 | at a low | 313 |
|
| 7 | at a lower | 190 |
|
