| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] in recent years | 91 |
|
| 2 | been [vb pp] in [adj] years | 88 |
|
| 3 | been [v-ing] in [adj] years | 9 |
|
| 4 | been make in [adj] years | 8 |
|
| 5 | been made in [adj] years | 8 |
|
| 6 | been developed in [adj] years | 6 |
|
| 7 | been develop in [adj] years | 6 |
|
| 8 | been eroded in [adj] years | 5 |
|
| 9 | been erode in [adj] years | 5 |
|
| 10 | been [verb] in previous years | 5 |
|
