| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] at a [noun] | 4420 |
|
| 2 | occur [prep] a [noun] | 372 |
|
| 3 | occur [prep] a [noun] | 372 |
|
| 4 | occur at [art] [noun] | 207 |
|
| 5 | occur at a [noun] | 59 |
|
