| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | were [verb] at a [noun] | 145 |
|
| 2 | were [verb] at a [noun sg] | 130 |
|
| 3 | be [verb] at a rate | 73 |
|
| 4 | [be] [verb] at a rate | 73 |
|
| 5 | [was/were] [verb] at a rate | 17 |
|
| 6 | were [verb] at [art] rate | 12 |
|
| 7 | were [verb] [prep] a rate | 6 |
|
| 8 | were [verb] at a rate | 6 |
|
