| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [vb pp] at a time | 20 |
|
| 2 | have [vb pp] at a time | 17 |
|
| 3 | [vb -s] [vb pp] at a time | 7 |
|
| 4 | has [vb pp] at a time | 6 |
|
| 5 | [vb past] [vb pp] at a time | 5 |
|
| 6 | [verb] come at a time | 5 |
|
| 7 | had [vb pp] at a time | 5 |
|
