| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was [vb pp] at a time | 28 |
|
| 2 | be [vb pp] at a time | 24 |
|
| 3 | is [vb pp] at a time | 14 |
|
| 4 | were [vb pp] at a time | 14 |
|
| 5 | being [vb pp] at a time | 5 |
|
| 6 | been [vb pp] at a time | 5 |
|
| 7 | be written at a time | 5 |
|
| 8 | be born at a time | 5 |
|
