| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] over the last [adj] years | 251 |
|
| 2 | [noun sg] over the last [num] years | 195 |
|
| 3 | [noun sg] over the [adj] 20 years | 30 |
|
| 4 | [noun sg] [prep] the last 20 years | 22 |
|
| 5 | [noun sg] [prep] the last 20 years | 22 |
|
| 6 | [noun] over the last 20 years | 16 |
|
| 7 | [noun sg] over the [num ord] 20 years | 16 |
|
| 8 | [noun sg] over the last 20 years | 7 |
|
| 9 | [noun sg] over the last 20 [noun pl] | 7 |
|
| 10 | [noun sg] over the last 20 [noun] | 7 |
|
| 11 | [noun sg] over [art] last 20 years | 7 |
|
| 12 | [noun sg] over the last 20 years | 7 |
|
| 13 | [noun sg] over the last 20 year | 7 |
|
| 14 | [noun sg] over the last 20 years | 7 |
|
