| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [num] [noun] [noun] | 2012 |
|
| 2 | [prep] a [num] [noun] [noun sg] | 1850 |
|
| 3 | [prep] [art] [num] [noun] period | 326 |
|
| 4 | [prep] [art] [num] [noun] period | 326 |
|
| 5 | [prep] a [adj] [noun] period | 324 |
|
| 6 | [prep] a [num] [noun] period | 208 |
|
| 7 | [prep] a [num] [noun] period | 204 |
|
| 8 | [prep] a [num] [noun] period | 204 |
|
