| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [was/were] [verb] at a time | 33 |
|
| 2 | [noun] [was/were] [vb pp] at a time | 29 |
|
| 3 | [noun] was [verb] at a time | 20 |
|
| 4 | [noun sg] [was/were] [verb] at a time | 14 |
|
| 5 | [noun pl] [was/were] [verb] at a time | 13 |
|
| 6 | [noun] were [verb] at a time | 13 |
|
