| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] at [art] [adj] level [prep] | 13 |
|
| 2 | [to-vb] at [art] [adj] level [prep] | 10 |
|
| 3 | [to-vb] at a [adj] level [prep] | 9 |
|
| 4 | [to-vb] at [art] [adj] level of | 7 |
|
| 5 | [to-vb] at [art] high level [prep] | 5 |
|
