No | Pattern | Freq | Relations |
---|---|---|---|
1 | [conj] a [noun] of [num] | 677 | |
2 | [conj] a [noun sg] of [num] | 652 | |
3 | [conj] a period of [adj] | 40 | |
4 | [conj] [art] period of [num] | 20 | |
5 | [conj] a period [prep] [num] | 17 | |
6 | [conj] a period [prep] [num] | 17 | |
7 | [conj] a period of [num] | 16 | |
8 | [conj] a period of [num] | 16 |