| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | twenty years [adv] [prep] [art] [noun] | 10 |
|
| 2 | twenty years [adv] [prep] [art] [noun] | 10 |
|
| 3 | twenty years [adv] in [art] [noun] | 6 |
|
| 4 | twenty years [adv] in [art] [noun] | 6 |
|
| 5 | twenty years [adv] [art] [adj] [noun] | 6 |
|
