| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [num] [noun] period | 204 |
|
| 2 | [prep] a [num] [noun] period | 204 |
|
| 3 | over [art] [num] [noun] period | 169 |
|
| 4 | over [art] [num] [noun] period | 169 |
|
| 5 | over a [num] [noun] [noun] | 150 |
|
| 6 | over a [adj] [noun] period | 142 |
|
| 7 | over a [num] [noun] period | 133 |
|
| 8 | over a [num] [noun] period | 132 |
|
