| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at the [noun pl] [prep] [noun] [subord] | 13 |
|
| 2 | at [art] [noun pl] of [noun] [subord] | 9 |
|
| 3 | at [art] [noun pl] [prep] [noun] when | 6 |
|
| 4 | at [art] [noun pl] [prep] [noun prp] [subord] | 5 |
|
