| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [vb pp] over [adj] years | 10 |
|
| 2 | has been [verb] over many years | 6 |
|
| 3 | has been [verb] over [det] years | 6 |
|
| 4 | has been [verb] over many years | 6 |
|
