| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [adv] [verb] at [art] rate | 11 |
|
| 2 | [be] [adv] [verb] at a rate | 8 |
|
| 3 | [be] [adv] [vb pp] at [art] rate | 6 |
|
| 4 | [be] [adv] [v-ing] at [art] rate | 5 |
|
| 5 | [am/are] [adv] [verb] at [art] rate | 5 |
|
| 6 | are [adv] [verb] at [art] rate | 5 |
|
