| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] [art] [adj] 20 years | 150 |
|
| 2 | [noun] [prep] [art] [num ord] 20 years | 79 |
|
| 3 | [noun] [prep] [art] [adj] 20 years | 71 |
|
| 4 | [noun] [prep] [art] past 20 years | 69 |
|
| 5 | [noun] [prep] [art] past 20 years | 69 |
|
| 6 | [noun] [prep] [art] last 20 years | 50 |
|
| 7 | [noun] [prep] [art] last 20 years | 50 |
|
| 8 | [noun] [prep] [art] next 20 years | 28 |
|
| 9 | [noun] [prep] [art] next 20 years | 28 |
|
