| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for [adj] years | 9030 |
|
| 2 | for [num] years | 6137 |
|
| 3 | [prep] twenty years | 396 |
|
| 4 | [prep] twenty years | 396 |
|
| 5 | for twenty [noun] | 343 |
|
| 6 | for twenty [noun pl] | 318 |
|
| 7 | for twenty year | 204 |
|
| 8 | for twenty years | 201 |
|
| 9 | for twenty years | 201 |
|
