| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [noun prp] [prep] a [noun] | 221 |
|
| 2 | [prep] [noun prp] after a [noun] | 91 |
|
| 3 | at [noun] after a [noun] | 32 |
|
| 4 | at [noun prp] after [art] [noun] | 20 |
|
