| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for [adv] twenty years | 83 |
|
| 2 | for over twenty years | 50 |
|
| 3 | for over twenty years | 50 |
|
| 4 | for nearly twenty years | 15 |
|
| 5 | for nearly twenty years | 15 |
|
| 6 | for almost twenty years | 10 |
|
| 7 | for almost twenty years | 10 |
|
