| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] at [art] [adj -er] level of | 14 |
|
| 2 | [verb] at a [adj -er] level of | 13 |
|
| 3 | [verb] at a [adj -er] level of | 13 |
|
| 4 | [verb] at [art] higher level of | 8 |
|
