| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] several years | 731 |
|
| 2 | [prep] several years | 731 |
|
| 3 | over [adj] years | 446 |
|
| 4 | over [det] years | 239 |
|
| 5 | over several [noun] | 146 |
|
| 6 | over several [noun pl] | 142 |
|
| 7 | over several year | 45 |
|
| 8 | over several years | 45 |
|
| 9 | over several years | 45 |
|
