| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of [adj] years [unc] duration | 52 |
|
| 2 | of [num] years [unc] duration | 52 |
|
| 3 | of three years [unc] [noun] | 40 |
|
| 4 | of three years [unc] [noun sg] | 39 |
|
| 5 | of three [noun] [unc] duration | 27 |
|
| 6 | of three [noun pl] [unc] duration | 27 |
|
| 7 | of three years [unc] duration | 25 |
|
| 8 | of three years [unc] duration | 25 |
|
| 9 | [prep] three years [unc] duration | 25 |
|
| 10 | of three year [unc] duration | 25 |
|
