| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [verb] at [art] rate of | 11 |
|
| 2 | been [verb] at [art] rate of | 11 |
|
| 3 | [been] [verb] at [art] rate of | 11 |
|
| 4 | [been] [v-ing] at [art] rate of | 8 |
|
| 5 | [been] [verb] at the rate of | 7 |
|
| 6 | [been] [verb] at the rate of | 7 |
|
