| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adj] year ' [noun] | 721 |
|
| 2 | [prep] twenty [noun] ' [noun] | 23 |
|
| 3 | [prep] twenty year ' [noun] | 19 |
|
| 4 | [prep] twenty year [unc] [noun] | 19 |
|
| 5 | [prep] twenty year ['s] [noun] | 19 |
|
