知道频数如何求频率

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select * from tbl_Articles WHERE ArticleID=311770 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=311770 LIMIT 0,1
select * from tbl_Articles_sphinx where id=311770 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(4152573,4077911,4072632,3972645,3972643,3972641,3972638,3972637,3972634,3972581,3949582,3916443,3906091,3906090,3900253,3875095,3848074,3847886,3847880,3845223,3844858,3844544,3844384,3843912,3843870,3829628,3829620,3829584,3829583,3824863) ORDER BY field (ArticleID,4152573,4077911,4072632,3972645,3972643,3972641,3972638,3972637,3972634,3972581,3949582,3916443,3906091,3906090,3900253,3875095,3848074,3847886,3847880,3845223,3844858,3844544,3844384,3843912,3843870,3829628,3829620,3829584,3829583,3824863)