| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | in a [noun] at [art] | 281 |
|
| 2 | in [noun] at [art] time | 254 |
|
| 3 | a [noun] at [art] time | 206 |
|
| 4 | in a [noun] [art] time | 6 |
|
