... frequency histogram 频次直方图 frequency in sampling 抽样次数 frequency index 频率指数 ...
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MessageLabs, the email-filtering company that Symantec acquired in 2008, posted a set of word maps today measuring the frequency of terms in spam emails from a random one-week sampling of junk mail pulled from the most prolific spam-spewing botnets.
FORBES: The Most Common Words In Spam Email
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