No | Pattern | Freq | Relations |
---|---|---|---|
1 | [verb] over a long period | 30 | |
2 | [vb past] over a long period | 8 | |
3 | [vb -s] over a long period | 7 | |
4 | [v-ing] over a long period | 5 | |
5 | over a long period [prep] | 9 | |
6 | over a long period [prep] | 9 | |
7 | over a long period of | 8 | |
8 | over a long period of | 8 |