| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] at [art] [adj -er] | 615 |
|
| 2 | [to-vb] at [art] [adj -er] | 67 |
|
| 3 | to operate at [art] [adj] | 15 |
|
| 4 | to operate [prep] [art] [adj -er] | 11 |
|
| 5 | to operate [prep] [art] [adj -er] | 11 |
|
| 6 | operate at [art] [adj -er] | 10 |
|
| 7 | to operate at [art] [adj -er] | 5 |
|
