| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | twenty years [noun] | 25 |
|
| 2 | twenty years [noun sg] | 16 |
|
| 3 | twenty years [noun prp] | 7 |
|
| 4 | twenty years time | 5 |
|
| 5 | twenty years time | 5 |
|
