| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | after [adj] years of [noun] | 276 |
|
| 2 | [prep] twenty years of [noun] | 14 |
|
| 3 | after twenty years [prep] [noun] | 7 |
|
| 4 | after twenty years [prep] [noun] | 7 |
|
| 5 | after twenty [noun] of [noun] | 6 |
|
| 6 | after twenty [noun pl] of [noun] | 6 |
|
| 7 | after twenty year of [noun] | 5 |
|
| 8 | after twenty years of [noun] | 5 |
|
