No | Pattern | Freq | Relations |
---|---|---|---|
1 | [prep] a long period of | 140 | |
2 | over a long period [prep] | 85 | |
3 | for a long period [prep] | 27 | |
4 | after a long period [prep] | 19 | |
5 | of a long period [prep] | 10 | |
6 | to a long period [prep] | 5 | |
7 | from a long period [prep] | 5 |