| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] of the [num ord] twenty years | 10 |
|
| 2 | [noun] of the last twenty years | 7 |
|
| 3 | [noun pl] of the [num ord] twenty years | 5 |
|
| 4 | [noun sg] of the [num ord] twenty years | 5 |
|
