| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [prep] the past few years | 42 |
|
| 2 | [vb pp] [prep] the past few years | 42 |
|
| 3 | [vb pp] in the past few years | 25 |
|
| 4 | [vb pp] in the past few years | 25 |
|
| 5 | [vb pp] over the past few years | 12 |
|
| 6 | [vb pp] over the past few years | 12 |
|
