| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | years [unc] [noun sg] | 1250 |
|
| 2 | four years [unc] | 80 |
|
| 3 | four years [noun sg] | 27 |
|
| 4 | four [unc] [noun sg] | 16 |
|
