| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | two [noun] ' [noun] | 489 |
|
| 2 | [adj] [noun] ' duration | 100 |
|
| 3 | two [noun] ['s] duration | 9 |
|
| 4 | two [noun] [unc] duration | 9 |
|
| 5 | two [noun] ' duration | 9 |
|
