| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [num] [noun] [prep] a [adj] | 2037 |
|
| 2 | [noun] [prep] a [adj] period | 704 |
|
| 3 | [num] [noun] [prep] a period | 29 |
|
| 4 | [num] [prep] a [adj] period | 17 |
|
