| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [prep] the [num ord] thirty years | 27 |
|
| 2 | [noun sg] [prep] the last thirty years | 21 |
|
| 3 | [noun sg] for the [num ord] thirty years | 8 |
|
| 4 | [noun sg] over the [num ord] thirty years | 8 |
|
| 5 | [noun sg] [prep] the next thirty years | 5 |
|
| 6 | [noun sg] of the [num ord] thirty years | 5 |
|
| 7 | [noun sg] in the [num ord] thirty years | 5 |
|
