| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | three years ['s] [noun] [prep] a | 6 |
|
| 2 | three years ' [noun] [prep] a | 6 |
|
| 3 | three years ' [noun] [prep] a | 6 |
|
| 4 | three years [unc] [noun sg] [prep] a | 5 |
|
