No | Pattern | Freq | Relations |
---|---|---|---|
1 | at a [noun] | 15341 | |
2 | at a [noun sg] | 14548 | |
3 | [prep] a period | 2137 | |
4 | [prep] a period | 2137 | |
5 | at [art] period | 34 | |
6 | at [art] period | 34 | |
7 | at a period | 17 | |
8 | at a period | 17 | |
9 | at a period | 17 |
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