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 of time | 10 | |
4 | over a longer period of time | 6 | |
5 | over a longer period of time | 6 |
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