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