| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [num] year ['s] [noun] | 1256 |
|
| 2 | [num] [noun] ['s] duration | 105 |
|
| 3 | [adj] year ['s] duration | 77 |
|
| 4 | [num] year [unc] duration | 76 |
|
