| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over the years have [vb pp] | 31 |
|
| 2 | over [art] years have [vb pp] | 31 |
|
| 3 | over [art] years has [vb pp] | 17 |
|
| 4 | over [art] years have [vb pp] | 8 |
|
