| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [was/were] [verb] at a [noun] | 303 |
|
| 2 | [noun] [was/were] [verb] at [art] time | 113 |
|
| 3 | [noun] [be] [verb] at a time | 47 |
|
| 4 | [noun] [was/were] [verb] [prep] a time | 43 |
|
| 5 | [noun] [was/were] [verb] [prep] a time | 43 |
|
| 6 | [noun] [was/were] [verb] at a time | 33 |
|
