| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of four years ' [noun sg] | 21 |
|
| 2 | of four years [unc] [noun sg] | 21 |
|
| 3 | of four years [unc] [noun sg] | 21 |
|
| 4 | of four years ' [noun sg] | 21 |
|
| 5 | of four years ['s] [noun sg] | 21 |
|
| 6 | of four years [unc] duration | 18 |
|
