| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] [art] last [adj] years | 1256 |
|
| 2 | [noun] [prep] [art] last [num] years | 1062 |
|
| 3 | [noun] [prep] [art] [adj] 20 years | 150 |
|
| 4 | [noun] [prep] [art] last 20 [noun] | 59 |
|
| 5 | [noun] [prep] [art] last 20 [noun pl] | 59 |
|
| 6 | [noun] [prep] [art] last 20 year | 50 |
|
| 7 | [noun] [prep] [art] last 20 years | 50 |
|
