| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a [noun] [noun] | 274 |
|
| 2 | [prep] a [noun] period | 109 |
|
| 3 | [prep] a [noun] period | 109 |
|
| 4 | over [art] [noun] period | 82 |
|
| 5 | over [art] [noun] period | 82 |
|
| 6 | over a [noun] period | 13 |
|
| 7 | over a [noun] period | 13 |
|
