| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] [adv] at a time | 10 |
|
| 2 | be [vb pp] [adv] at a time | 10 |
|
| 3 | [was/were] [vb pp] [adv] at a time | 5 |
|
| 4 | [vb pp] [adv] at a [adj] time | 6 |
|
| 5 | [vb pp] [adv] at a [adj] time | 5 |
|
| 6 | [vb pp] [adv] at a time when | 7 |
|
| 7 | [vb pp] [adv] at a time when | 7 |
|
| 8 | [vb pp] [adv] at a time [adv] | 7 |
|
| 9 | [vb pp] [adv] at a time [Wh adv] | 7 |
|
