| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] years of [art] [noun] | 470 |
|
| 2 | twenty years [prep] [art] [noun] | 50 |
|
| 3 | twenty [noun] of [art] [noun] | 28 |
|
| 4 | twenty [noun pl] of [art] [noun] | 20 |
|
| 5 | twenty year of [art] [noun] | 5 |
|
