| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] years has been the [adj] | 10 |
|
| 2 | [adj] years has been the [adj] | 7 |
|
| 3 | recent years has been the [adj] | 7 |
|
| 4 | recent years has been the [adj] | 7 |
|
| 5 | years has been the [adj] [noun] | 10 |
|
| 6 | years has been the [adj] [noun sg] | 10 |
|
