| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [noun] [noun] | 2956 |
|
| 2 | a [noun] ' [noun] | 804 |
|
| 3 | at [noun] ' [noun] | 184 |
|
| 4 | at a [noun] ' | 45 |
|
