| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | up to [num] years [unc] | 26 |
|
| 2 | up to [adj] years [unc] | 26 |
|
| 3 | up [prep] three years [unc] | 7 |
|
| 4 | up [prep] three years [unc] | 7 |
|
| 5 | [adv] to three years [unc] | 7 |
|
| 6 | up to three [noun pl] [unc] | 6 |
|
| 7 | up to three years [unc] | 6 |
|
| 8 | up to three year [unc] | 6 |
|
| 9 | up to three years [unc] | 6 |
|
| 10 | up to three [noun] [unc] | 6 |
|
