| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [noun prp] on [noun] | 798 |
|
| 2 | [noun prp] on a [noun] | 539 |
|
| 3 | at [noun prp] a [noun] | 110 |
|
| 4 | at [noun prp] on a | 21 |
|
