| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | development over the [adj] [num] years | 11 |
|
| 2 | development over the [num ord] [num] years | 9 |
|
| 3 | development over the last [num] years | 6 |
|
| 4 | development over the last [num] years | 6 |
|
