| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [adj] for several [noun] | 8 |
|
| 2 | [vb -s] been [adj] for several [noun] | 8 |
|
| 3 | [vb -s] been [adj] for several [noun] | 8 |
|
| 4 | [vb -s] been [adj] for several [noun pl] | 7 |
|
