| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [verb] at a [noun] | 883 |
|
| 2 | [noun] [verb] at a [noun sg] | 833 |
|
| 3 | [noun] [verb] at [art] time | 342 |
|
| 4 | [noun] [verb] [prep] a time | 156 |
|
| 5 | [noun] [verb] at a time | 98 |
|
