| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | twenty years ' [noun] | 38 |
|
| 2 | twenty years ' [noun] | 38 |
|
| 3 | twenty years ' [noun sg] | 37 |
|
| 4 | twenty years ' time | 13 |
|
| 5 | twenty years ' time | 13 |
|
| 6 | twenty years ' worth | 5 |
|
| 7 | twenty years ' worth | 5 |
|
