| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [noun] [prep] 20 years [unc] | 7 |
|
| 2 | [adj] [noun] [prep] 20 years [unc] | 5 |
|
| 3 | [noun] [prep] 20 years [unc] [noun] | 12 |
|
| 4 | [noun] [prep] 20 years [unc] [noun sg] | 12 |
|
