| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] years ' | 1401 |
|
| 2 | [num] years ' | 1274 |
|
| 3 | 15 [noun] ' | 43 |
|
| 4 | 15 [noun pl] ' | 43 |
|
| 5 | 15 years ' | 30 |
|
| 6 | 15 year ' | 30 |
|
| 7 | 15 years [unc] | 30 |
|
