| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | their [noun] over [art] period [prep] | 6 |
|
| 2 | their [noun] over [art] period of | 6 |
|
| 3 | their [noun] over [art] period [prep] | 6 |
|
| 4 | their [noun] over a period [prep] | 5 |
|
