No | Pattern | Freq | Relations |
---|---|---|---|
1 | [prep] a long period of time | 88 | |
2 | [prep] a long period [prep] time | 88 | |
3 | [prep] a long period [prep] time | 88 | |
4 | over a long period [prep] time | 71 | |
5 | over a long period [prep] time | 71 | |
6 | for a long period [prep] time | 14 | |
7 | for a long period [prep] time | 14 |