| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over the past 40 year | 9 |
|
| 2 | [noun] over the past 40 [noun pl] | 9 |
|
| 3 | [noun] over the past 40 [noun] | 9 |
|
| 4 | [noun] over the past 40 years | 9 |
|
