| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | twenty years [adv] the [noun] | 16 |
|
| 2 | twenty years [adv] the [noun sg] | 11 |
|
| 3 | twenty years ago the [noun] | 10 |
|
| 4 | twenty years later the [noun] | 5 |
|
