| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of three years ' [noun] | 40 |
|
| 2 | of three year ' [noun] | 40 |
|
| 3 | of three year ' [noun sg] | 39 |
|
| 4 | of three year ' duration | 25 |
|
| 5 | of three year ' duration | 25 |
|
