| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | three [noun] [unc] duration | 28 |
|
| 2 | three [noun] ' duration | 28 |
|
| 3 | three [noun] ' duration | 28 |
|
| 4 | three [noun pl] [unc] duration | 28 |
|
| 5 | three [noun] ['s] duration | 28 |
|
| 6 | three years [unc] duration | 25 |
|
| 7 | three year [unc] duration | 25 |
|
