No | Pattern | Freq | Relations |
---|---|---|---|
1 | [prep] a [adj] period of | 618 | |
2 | a [adj] period of [noun sg] | 613 | |
3 | [prep] a period of [noun sg] | 453 | |
4 | [prep] [adj] period of [noun sg] | 321 | |
5 | [prep] a [adj] of [noun sg] | 22 | |
6 | [prep] a [adj] period [noun sg] | 10 |