No | Pattern | Freq | Relations |
---|---|---|---|
1 | a [adj -er] period [prep] | 63 | |
2 | a [adj -er] period of | 58 | |
3 | a longer period [prep] | 29 | |
4 | a further period [prep] | 22 | |
5 | an [adj -er] period [prep] | 10 | |
6 | a earlier period [prep] | 10 | |
7 | a shorter period [prep] | 7 | |
8 | a [adj -er] period in | 6 |