| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [v-ing] [prep] years | 84 |
|
| 2 | [v-ing] [prep] recent years | 27 |
|
| 3 | been [v-ing] [prep] recent | 18 |
|
| 4 | been [prep] recent years | 6 |
|
