| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [num] years ' [noun] | 684 |
|
| 2 | [noun sg] [prep] [num] years ' | 230 |
|
| 3 | [noun sg] [prep] [num] years [noun] | 91 |
|
| 4 | [noun sg] [prep] years ' [noun] | 18 |
|
