| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] 20 years | 501 |
|
| 2 | [prep] years [pers pn] | 217 |
|
| 3 | [prep] 20 [pers pn] | 24 |
|
| 4 | 20 years [pers pn] | 15 |
|
