| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | of [noun] over a long period | 18 |
|
| 2 | of [noun] over [art] long period | 18 |
|
| 3 | of [noun] over a long period | 18 |
|
| 4 | of [noun] over [art] long period | 14 |
|
| 5 | of [noun sg] over [art] long period | 12 |
|
| 6 | of [noun pl] over [art] long period | 5 |
|
