| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] at a [adj] | 113 |
|
| 2 | [is] at a [adj -er] | 18 |
|
| 3 | [is] at a low | 11 |
|
| 4 | [be] at a lower | 11 |
|
| 5 | [is] [prep] a lower | 10 |
|
| 6 | [is] at [art] lower | 10 |
|
| 7 | [is] [prep] a lower | 10 |
|
| 8 | [is] at a lower | 5 |
|
