| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [noun sg] a [noun] [prep] | 23 |
|
| 2 | at [noun sg] a [noun sg] [prep] | 20 |
|
| 3 | at [noun sg] a [noun] of | 15 |
|
| 4 | at present a [noun] [prep] | 7 |
|
