| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [num] to [num] years [unc] [noun] | 32 |
|
| 2 | [num] to [adj] years [unc] [noun] | 32 |
|
| 3 | [num] to three [noun] [unc] [noun] | 6 |
|
| 4 | [num] [prep] three years [unc] [noun] | 6 |
|
| 5 | [num] to three [noun pl] [unc] [noun] | 6 |
|
| 6 | [num] to three year [unc] [noun] | 5 |
|
| 7 | [num] to three years [unc] [noun] | 5 |
|
| 8 | [adj] to three years [unc] [noun] | 5 |
|
