| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [vb pp] at a [noun] | 379 |
|
| 2 | [was/were] [vb pp] at [art] time | 183 |
|
| 3 | [be] [vb pp] at a time | 94 |
|
| 4 | [was/were] [vb pp] [prep] a time | 59 |
|
| 5 | [was/were] [vb pp] [prep] a time | 59 |
|
| 6 | [was/were] [verb] at a time | 48 |
|
| 7 | [was/were] [vb pp] at a time | 42 |
|
