| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at a [noun] [prep] | 5162 |
|
| 2 | a [noun] [prep] [unc] | 1992 |
|
| 3 | at a [noun] [unc] | 292 |
|
| 4 | at [noun] [prep] [unc] | 104 |
|
