| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [num] years [prep] [noun] | 3834 |
|
| 2 | twenty years [prep] [noun] | 82 |
|
| 3 | twenty [num] [prep] [noun] | 63 |
|
| 4 | twenty [num] years [prep] | 41 |
|
| 5 | twenty [num] years [noun] | 10 |
|
