| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] the last 30 years | 30 |
|
| 2 | [noun sg] [prep] the [num ord] 30 years | 24 |
|
| 3 | [noun] over the [num ord] 30 years | 22 |
|
| 4 | [noun pl] [prep] the [num ord] 30 years | 13 |
|
| 5 | [noun] [prep] the next 30 years | 9 |
|
| 6 | [noun] for the [num ord] 30 years | 6 |
|
| 7 | [noun] in the [num ord] 30 years | 6 |
|
| 8 | [noun] of the [num ord] 30 years | 5 |
|
