| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] years ['s] [noun] | 1253 |
|
| 2 | 20 [noun] ['s] [noun] | 60 |
|
| 3 | 20 [noun pl] ['s] [noun] | 57 |
|
| 4 | 20 year ['s] [noun] | 45 |
|
| 5 | 20 years [unc] [noun] | 45 |
|
