No | Pattern | Freq | Relations |
---|---|---|---|
1 | a long period of [noun] | 151 | |
2 | a long period of [noun] | 151 | |
3 | a long period of [noun sg] | 146 | |
4 | a long period of time | 102 | |
5 | a long period of time | 102 | |
6 | a long period of [noun pl] | 5 |
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