| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [adj] [noun] [prep] | 1903 |
|
| 2 | a [adj] [noun] [prep] [unc] | 713 |
|
| 3 | at a [noun] [prep] [unc] | 72 |
|
| 4 | at a [adj] [noun] [unc] | 46 |
|
| 5 | at [adj] [noun] [prep] [unc] | 8 |
|
