| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [adj] rate | 489 |
|
| 2 | [vb -s] at a [adj] | 202 |
|
| 3 | [vb -s] a [adj] rate | 35 |
|
| 4 | [vb -s] at a rate | 14 |
|
