| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been working at the [noun] | 11 |
|
| 2 | have been working at the [noun] | 11 |
|
| 3 | been working at the [noun] [prep] | 6 |
|
| 4 | been working at the [noun] [prep] | 6 |
|
