| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [verb] at a rate of | 16 |
|
| 2 | [is] [verb] at a rate of | 16 |
|
| 3 | [is] [v-ing] at a rate of | 13 |
|
| 4 | [is] grow at a rate of | 6 |
|
| 5 | [is] growing at a rate of | 6 |
|
