No | Pattern | Freq | Relations |
---|---|---|---|
1 | [prep] a [adj] period of | 618 | |
2 | [prep] a [adj] period of | 584 | |
3 | [prep] a long [noun] of | 507 | |
4 | [prep] a long period [prep] | 162 | |
5 | [prep] a long period [prep] | 162 | |
6 | [prep] [art] long period of | 154 | |
7 | [prep] a long period of | 152 | |
8 | [prep] a long period of | 140 |