| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun] at [art] [noun] | 1499 |
|
| 2 | [prep] a [noun] at [art] [noun sg] | 1243 |
|
| 3 | [prep] [art] [noun] at [art] time | 471 |
|
| 4 | [prep] a [noun] [prep] [art] time | 143 |
|
| 5 | [prep] a [noun] at [art] time | 77 |
|
