No | Pattern | Freq | Relations |
---|---|---|---|
1 | [prep] a longer period of time | 10 | |
2 | [prep] a longer period of time | 10 | |
3 | [prep] a longer period [prep] time | 10 | |
4 | [prep] a longer period [prep] time | 10 | |
5 | [prep] a longer period [prep] time | 10 | |
6 | over a longer period [prep] time | 6 | |
7 | over a longer period [prep] time | 6 |