| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [verb] at a [noun] | 312 |
|
| 2 | [verb] [verb] a certain [noun] | 245 |
|
| 3 | [verb] at a certain [noun] | 28 |
|
| 4 | [verb] [verb] at a certain | 6 |
|
