| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [adv] 20 years | 35 |
|
| 2 | [noun] [adv] 20 years | 35 |
|
| 3 | [noun sg] [adv] 20 years | 16 |
|
| 4 | [noun] over 20 years | 16 |
|
| 5 | [noun] over 20 years | 16 |
|
| 6 | [noun pl] [adv] 20 years | 11 |
|
| 7 | [noun] about 20 years | 9 |
|
| 8 | [noun] about 20 years | 9 |
|
| 9 | [noun prp] [adv] 20 years | 7 |
|
| 10 | [noun] nearly 20 years | 6 |
|
| 11 | [noun] nearly 20 years | 6 |
|
