| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [art] thirty [noun] | 82 |
|
| 2 | [prep] [art] years [noun] | 54 |
|
| 3 | [prep] [art] thirty years | 48 |
|
| 4 | [art] thirty years [noun] | 37 |
|
| 5 | [prep] thirty years [noun] | 7 |
|
