| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | twenty year [unc] [noun sg] | 39 |
|
| 2 | [prep] year [unc] [noun sg] | 26 |
|
| 3 | [prep] twenty year [unc] | 23 |
|
| 4 | [prep] twenty year [noun sg] | 10 |
|
