| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] twenty years [pers pn] [verb] | 8 |
|
| 2 | [prep] twenty years [pers pn] [verb] | 8 |
|
| 3 | for twenty years [pers pn] [verb] | 6 |
|
| 4 | [prep] twenty years [pers pn] [vb past] | 6 |
|
| 5 | for twenty years [pers pn] [verb] | 6 |
|
