| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] twenty years ' time | 8 |
|
| 2 | in twenty years [unc] time | 8 |
|
| 3 | [prep] twenty years ' time | 8 |
|
| 4 | [prep] twenty years ['s] time | 8 |
|
