No | Pattern | Freq | Relations |
---|---|---|---|
1 | [prep] a [adj] period | 1820 | |
2 | [prep] a [adj] period | 1820 | |
3 | over a [adj] [noun] | 1566 | |
4 | over a [adj] [noun sg] | 1520 | |
5 | over [art] [adj] period | 603 | |
6 | over a [adj] period | 545 | |
7 | over a [adj] period | 488 | |
8 | over a [adj] period | 488 |