No | Pattern | Freq | Relations |
---|---|---|---|
1 | and [prep] a period of time | 9 | |
2 | and [prep] a period of time | 9 | |
3 | and [prep] a period of time | 9 | |
4 | and [prep] a period of time | 9 | |
5 | and over a period of time | 7 | |
6 | and over a period of time | 7 |
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