| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | in twenty years ' [noun] | 9 |
|
| 2 | in twenty years ['s] [noun sg] | 9 |
|
| 3 | in twenty years ['s] time | 8 |
|
| 4 | in twenty years ['s] time | 8 |
|
