| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to [adj] years [unc] | 206 |
|
| 2 | to [num] years [unc] | 203 |
|
| 3 | [prep] 15 years [unc] | 22 |
|
| 4 | [prep] 15 years [unc] | 22 |
|
| 5 | to 15 [noun] [unc] | 13 |
|
| 6 | to 15 [noun pl] [unc] | 13 |
|
| 7 | to 15 years [unc] | 11 |
|
| 8 | to 15 years [unc] | 11 |
|
| 9 | to 15 year [unc] | 11 |
|
