| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adj] years ' [noun] | 721 |
|
| 2 | [prep] [num] years ' [noun] | 684 |
|
| 3 | [prep] twenty [noun] ' [noun] | 23 |
|
| 4 | [prep] twenty [noun pl] ' [noun] | 23 |
|
| 5 | [prep] twenty years ['s] [noun] | 19 |
|
| 6 | [prep] twenty years ' [noun] | 19 |
|
| 7 | [prep] twenty years [unc] [noun] | 19 |
|
| 8 | [prep] twenty years ' [noun] | 19 |
|
| 9 | [prep] twenty year ' [noun] | 19 |
|
