No | Pattern | Freq | Relations |
---|---|---|---|
1 | [prep] a [adj] period | 2001 | |
2 | [prep] a [adj] period | 1820 | |
3 | [prep] a three-year [noun] | 150 | |
4 | [prep] a three-year [noun sg] | 147 | |
5 | [prep] [art] three-year period | 50 | |
6 | [prep] a three-year period | 34 | |
7 | [prep] a three-year period | 34 | |
8 | [prep] a three-year period | 34 |