No | Pattern | Freq | Relations |
---|---|---|---|
1 | [prep] a long period of | 140 | |
2 | [prep] a long period of | 140 | |
3 | [prep] a long period of | 140 | |
4 | over a long period of | 77 | |
5 | over a long period of | 77 | |
6 | for a long period of | 18 | |
7 | for a long period of | 18 | |
8 | after a long period of | 16 | |
9 | after a long period of | 16 | |
10 | of a long period of | 10 | |
11 | of a long period of | 10 | |
12 | to a long period of | 5 | |
13 | to a long period of | 5 |