| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun sg] [verb] at [art] | 582 |
|
| 2 | a [noun sg] at [art] time | 238 |
|
| 3 | [noun sg] [verb] at [art] time | 168 |
|
| 4 | a [noun sg] [verb] [art] time | 22 |
|
