| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [verb] at a | 221 |
|
| 2 | [verb] at a high | 139 |
|
| 3 | [prep] [verb] a high | 82 |
|
| 4 | [prep] [verb] at high | 9 |
|
