No | Pattern | Freq | Relations |
---|---|---|---|
1 | over a long period of time | 77 | |
2 | over a long period [prep] time | 77 | |
3 | over a long period [prep] time | 77 | |
4 | over a long period [prep] time | 71 | |
5 | over a longer period [prep] time | 6 |
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