| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | after [adj] years | 1853 |
|
| 2 | after [num] years | 1681 |
|
| 3 | [prep] four years | 820 |
|
| 4 | after four [noun] | 254 |
|
| 5 | after four [noun pl] | 247 |
|
| 6 | after four year | 80 |
|
| 7 | after four years | 80 |
|
