| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over long period [prep] [noun] | 11 |
|
| 2 | [noun pl] over long period [prep] [noun] | 7 |
|
| 3 | over a long period [prep] [noun] | 78 |
|
| 4 | over [art] long period [prep] [noun] | 78 |
|
| 5 | over a long period [prep] [noun] | 78 |
|
| 6 | over [art] long period [prep] [noun] | 78 |
|
