| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have worked at a | 9 |
|
| 2 | [verb] worked at a | 9 |
|
| 3 | worked at a [adj] | 8 |
|
| 4 | worked at a [adj] | 8 |
|
| 5 | worked at a [noun] | 6 |
|
| 6 | worked at a [noun sg] | 6 |
|
