| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [art] thirty years [noun] | 26 |
|
| 2 | [prep] the thirty years [noun] | 26 |
|
| 3 | [prep] the thirty years [noun] | 26 |
|
| 4 | [prep] [art] thirty years [noun] | 26 |
|
| 5 | [prep] thirty years [prep] [noun] | 20 |
|
| 6 | [prep] thirty years [prep] [noun] | 20 |
|
| 7 | [prep] thirty years of [noun] | 17 |
|
| 8 | [prep] thirty years of [noun] | 17 |
|
