| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | after [adj] years | 1853 |
|
| 2 | after [num] years | 1681 |
|
| 3 | [prep] 30 years | 315 |
|
| 4 | after 30 [noun] | 86 |
|
| 5 | after 30 [noun pl] | 80 |
|
| 6 | after 30 years | 35 |
|
| 7 | after 30 year | 35 |
|
