No | Pattern | Freq | Relations |
---|---|---|---|
1 | [prep] [noun pl] [prep] a long period | 9 | |
2 | [prep] [noun pl] [prep] a long period | 9 | |
3 | [prep] [noun pl] over a long period | 8 | |
4 | [prep] [noun pl] over a long period | 8 | |
5 | [prep] [noun pl] [prep] a longer period | 5 | |
6 | of [noun pl] [prep] a long period | 5 |