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