| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over the last twenty year | 23 |
|
| 2 | [noun] over the last twenty [noun pl] | 23 |
|
| 3 | [noun] over the last twenty years | 23 |
|
| 4 | [noun sg] over the last twenty [noun] | 11 |
|
| 5 | [noun pl] over the last twenty [noun] | 9 |
|
