| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [num] [noun sg] [modal v] | 1949 |
|
| 2 | [num] years [noun sg] | 769 |
|
| 3 | [num] years [modal v] | 266 |
|
| 4 | years [noun sg] [modal v] | 20 |
|
