| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] three years | 605 |
|
| 2 | [prep] three years [unc] | 102 |
|
| 3 | [noun] [prep] years [unc] | 28 |
|
| 4 | [noun] [prep] three [unc] | 22 |
|
