| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | years of [pron] [noun] | 425 |
|
| 2 | twenty years of [noun] | 42 |
|
| 3 | twenty years of [pron] | 14 |
|
| 4 | twenty years [pron] [noun] | 11 |
|
| 5 | twenty of [pron] [noun] | 5 |
|
