| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [vb past] at a [noun] | 98 |
|
| 2 | [noun sg] [verb] at a time | 62 |
|
| 3 | [noun sg] [vb past] at [art] time | 38 |
|
| 4 | [noun] [vb past] at a time | 32 |
|
| 5 | [noun sg] [vb past] [prep] a time | 23 |
|
| 6 | [noun sg] [vb past] [prep] a time | 23 |
|
| 7 | [noun sg] [vb past] at a time | 18 |
|
