| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | twenty years [prep] the [noun] | 47 |
|
| 2 | twenty years [prep] the [noun sg] | 41 |
|
| 3 | twenty years after the [noun] | 14 |
|
| 4 | twenty years in the [noun] | 11 |
|
| 5 | twenty years of the [noun] | 5 |
|
