| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | than three years ' [noun] | 10 |
|
| 2 | than three years ' [noun] | 10 |
|
| 3 | than three years [unc] [noun] | 10 |
|
| 4 | than three years [unc] [noun] | 10 |
|
| 5 | than three years ['s] [noun] | 10 |
|
| 6 | than three years [unc] [noun sg] | 9 |
|
