| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] recent years [pers pn] [verb] become | 12 |
|
| 2 | [prep] recent years [pers pn] have become | 12 |
|
| 3 | [prep] recent years [pers pn] [vb -s] become | 10 |
|
| 4 | in recent years [pers pn] [verb] become | 10 |
|
| 5 | [prep] recent years [pers pn] has become | 10 |
|
| 6 | [prep] recent years it [verb] become | 9 |
|
