| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] at a [noun] [prep] | 1701 |
|
| 2 | [verb] a certain [noun] [prep] | 843 |
|
| 3 | at a certain [noun] [prep] | 42 |
|
| 4 | [verb] at a certain [noun] | 28 |
|
| 5 | [verb] at certain [noun] [prep] | 17 |
|
