| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] for the [num ord] 20 years | 13 |
|
| 2 | [noun sg] for the [num ord] 20 years | 7 |
|
| 3 | [noun prp] for the [num ord] 20 years | 5 |
|
| 4 | [verb] for the [num ord] 20 years | 5 |
|
