| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | twenty year ['s] [noun] | 40 |
|
| 2 | [prep] year ['s] [noun] | 27 |
|
| 3 | [prep] twenty year ['s] | 21 |
|
| 4 | [prep] twenty year [noun] | 14 |
|
