| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over the past 20 years | 29 |
|
| 2 | [noun sg] over the [adj] 20 years | 14 |
|
| 3 | [noun pl] over the [adj] 20 years | 11 |
|
| 4 | [noun prp] over the [adj] 20 years | 5 |
|
