| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | years have [vb pp] a [adj] | 43 |
|
| 2 | years have [vb pp] a [adj] | 27 |
|
| 3 | years have seen a [adj] | 19 |
|
| 4 | years has [vb pp] a [adj] | 15 |
|
| 5 | years have witnessed a [adj] | 7 |
|
