| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for [adv] twenty years | 83 |
|
| 2 | [adj] for twenty years | 15 |
|
| 3 | [adj] for [adv] twenty | 7 |
|
| 4 | [adj] [adv] twenty years | 6 |
|
