| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] be [verb] at a | 878 |
|
| 2 | be [verb] at a time | 107 |
|
| 3 | [noun] [verb] at a time | 98 |
|
| 4 | [noun] be [verb] at time | 10 |
|
