| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | years of [noun] [noun] | 341 |
|
| 2 | two years of [noun] | 172 |
|
| 3 | two of [noun] [noun] | 53 |
|
| 4 | two years [noun] [noun] | 14 |
|
