| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] 20 years and [verb] | 8 |
|
| 2 | [prep] 20 years and [verb] | 8 |
|
| 3 | for 20 years and [verb] | 6 |
|
| 4 | for 20 years and [verb] | 6 |
|
| 5 | [adv] 20 years and [verb] | 6 |
|
| 6 | [adv] 20 years and [verb] | 6 |
|
