| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [art] [adj] years ' | 62 |
|
| 2 | [prep] [art] [num] years ' | 34 |
|
| 3 | [prep] [art] thirty years [unc] | 14 |
|
| 4 | [prep] [art] thirty years ' | 14 |
|
| 5 | [prep] [art] thirty [noun] ' | 14 |
|
| 6 | [prep] [art] thirty years ' | 14 |
|
| 7 | [prep] [art] thirty [noun pl] ' | 14 |
|
| 8 | [prep] [art] thirty years ' | 14 |
|
| 9 | [prep] [art] thirty years ' | 14 |
|
| 10 | [prep] [art] thirty year ' | 14 |
|
| 11 | [prep] [art] thirty years ['s] | 14 |
|
