No | Pattern | Freq | Relations |
---|---|---|---|
1 | at a [adj] period | 25 | |
2 | at a [adj] period | 21 | |
3 | at a particular period | 6 | |
4 | at a particular period | 6 | |
5 | at a critical period | 5 | |
6 | at a critical period | 5 | |
7 | at a period [adv] | 8 | |
8 | at a period [Wh adv] | 7 | |
9 | at a period [prep] | 7 | |
10 | at a period [prep] | 7 | |
11 | at a period when | 7 | |
12 | at a period when | 7 | |
13 | at a period of | 5 | |
14 | at a period of | 5 |