| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] four years | 820 |
|
| 2 | [prep] four years | 820 |
|
| 3 | over [adj] years | 446 |
|
| 4 | over [num] years | 63 |
|
| 5 | over four [noun] | 12 |
|
| 6 | over four [noun pl] | 12 |
|
| 7 | over four years | 8 |
|
| 8 | over four years | 8 |
|
| 9 | over four year | 8 |
|
