| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] at a [adj] rate | 184 |
|
| 2 | [is] [verb] at a [adj] | 146 |
|
| 3 | [is] [verb] at a rate | 21 |
|
| 4 | [is] [verb] a [adj] rate | 5 |
|
