| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] working at [art] | 14 |
|
| 2 | [verb] [been] working at [art] | 14 |
|
| 3 | [vb past] [been] working at [art] | 6 |
|
| 4 | had [been] working at [art] | 6 |
|
| 5 | [been] working at [art] [noun] | 12 |
|
| 6 | [been] working at [art] [noun sg] | 9 |
|
