| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was [v-ing] at an [adj] [noun sg] | 13 |
|
| 2 | were [v-ing] at an [adj] [noun sg] | 8 |
|
| 3 | [was/were] [v-ing] at an annual [noun sg] | 6 |
|
| 4 | [was/were] [v-ing] at an [adj] rate | 5 |
|
