| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | the [noun] over [art] period of | 41 |
|
| 2 | the [noun] over a period of | 39 |
|
| 3 | the [noun] over a period of | 39 |
|
| 4 | the [noun sg] over [art] period of | 34 |
|
| 5 | the [noun pl] over [art] period of | 6 |
|
