| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [prep] a period | 76 |
|
| 2 | [conj] over a [noun] | 74 |
|
| 3 | [conj] over a [noun sg] | 68 |
|
| 4 | [conj] over [art] period | 40 |
|
| 5 | [conj] over a period | 29 |
|
