| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | years [prep] [noun prp] | 1241 |
|
| 2 | twenty years [prep] | 254 |
|
| 3 | twenty [prep] [noun prp] | 20 |
|
| 4 | twenty years [noun prp] | 7 |
|
