| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over the [num ord] twenty years | 30 |
|
| 2 | [noun] over the [num ord] twenty year | 30 |
|
| 3 | [noun] over the [num ord] twenty [noun pl] | 30 |
|
| 4 | [noun] over the last twenty [noun] | 23 |
|
| 5 | [noun sg] over the [num ord] twenty [noun] | 15 |
|
| 6 | [noun pl] over the [num ord] twenty [noun] | 11 |
|
| 7 | [noun] over the next twenty [noun] | 7 |
|
