| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] years | 74755 |
|
| 2 | [num] years | 55310 |
|
| 3 | 15 [noun] | 4821 |
|
| 4 | 15 [noun pl] | 2844 |
|
| 5 | 15 year | 779 |
|
| 6 | 15 years | 731 |
|
