| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over [adj] years | 2052 |
|
| 2 | over [num] years | 2052 |
|
| 3 | [adv] 20 years | 297 |
|
| 4 | [adv] 20 years | 289 |
|
| 5 | over 20 [noun] | 193 |
|
| 6 | over 20 [noun pl] | 180 |
|
| 7 | over 20 year | 128 |
|
| 8 | over 20 years | 127 |
|
| 9 | over 20 years | 127 |
|
