| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] [noun] | 216780 |
|
| 2 | [prep] [art] [adj] period | 3855 |
|
| 3 | [prep] [art] [adj] period | 3855 |
|
| 4 | [prep] a [adj] period | 1820 |
|
| 5 | [prep] a [adj] period | 1796 |
|
| 6 | [prep] a [adj] period | 1646 |
|
