| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [noun] [noun sg] | 2715 |
|
| 2 | a [noun] ' [noun sg] | 787 |
|
| 3 | at [noun] ' [noun sg] | 122 |
|
| 4 | at a [noun] ' | 45 |
|
