| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at the rate [prep] | 261 |
|
| 2 | at the [adj -est] [prep] | 159 |
|
| 3 | the [adj -est] rate [prep] | 57 |
|
| 4 | at the [adj -est] rate | 14 |
|
