| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] twenty years [prep] [noun] | 26 |
|
| 2 | [prep] twenty years [prep] [noun] | 26 |
|
| 3 | [prep] twenty years [prep] [noun sg] | 17 |
|
| 4 | [prep] twenty years of [noun] | 14 |
|
| 5 | after twenty years [prep] [noun] | 7 |
|
| 6 | after twenty years [prep] [noun] | 7 |
|
| 7 | [prep] twenty years [prep] [noun prp] | 6 |
|
| 8 | for twenty years [prep] [noun] | 6 |
|
| 9 | for twenty years [prep] [noun] | 6 |
|
