| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | in recent years it has [vb pp] | 16 |
|
| 2 | in recent years it has [vb pp] | 16 |
|
| 3 | in [adj] years it has [vb pp] | 16 |
|
| 4 | in [adj] years it has become | 9 |
|
