| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] years [noun] | 1660 |
|
| 2 | [num] years [noun] | 1147 |
|
| 3 | 15 [noun] [noun] | 497 |
|
| 4 | 15 [noun pl] [noun] | 81 |
|
| 5 | 15 year [noun] | 40 |
|
| 6 | 15 years [noun] | 21 |
|
