| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] three years ' [noun] | 92 |
|
| 2 | [noun] [prep] three years ' | 29 |
|
| 3 | [noun] [prep] years ' [noun] | 18 |
|
| 4 | [noun] [prep] three years [noun] | 5 |
|
