| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been made [prep] recent years | 6 |
|
| 2 | be made [prep] recent years | 6 |
|
| 3 | [been] made [prep] recent years | 6 |
|
| 4 | [be] made in recent years | 6 |
|
