| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [adj] years [noun] | 710 |
|
| 2 | [prep] thirty [noun] [noun] | 28 |
|
| 3 | [prep] thirty [noun pl] [noun] | 14 |
|
| 4 | [prep] thirty year [noun] | 7 |
|
