| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] twenty years [prep] [adj] [noun] | 5 |
|
| 2 | twenty years [prep] [art] [adj] [noun] | 7 |
|
| 3 | twenty years [prep] [art] [adj] [noun] | 7 |
|
