| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] over the [adj] 30 years | 16 |
|
| 2 | [noun pl] over [art] past 30 years | 9 |
|
| 3 | [noun pl] over [art] [adj] 30 years | 9 |
|
| 4 | [noun pl] over [art] past 30 years | 9 |
|
| 5 | [noun pl] over [art] [num ord] 30 years | 7 |
|
| 6 | [noun pl] over [art] last 30 years | 6 |
|
| 7 | [noun pl] over [art] last 30 years | 6 |
|
