我用在线词典wordnik查了这个词，这类网络词典的一个特点是有附一个反映单词使用频率随时间变化的表格。
I was looking at the web based dictionary wordnik and one of the features they have is a little graphic representing frequency of a word's appearance over time.
柯林斯词典的专家们通过追踪单词出现的频率，已经编辑出一个在日常使用中消失的单词的列表。
Collins Dictionary experts have compiled a list of words which have fallen out of use by tracking how often they appear.
如您所见，分析返回了很多单词，根据在英语中的常见用途，很多使用频率高的单词是不相关的。
As you can see, the analysis returned a lot of words, with many frequent words being irrelevant by dint of their common usage in the English language.
本课程中，学生将学习找出、辨别和使用英语单词重音、句子重音、语调结构、高频率出现的元音和辅音。
In this course students will learn to discover recognize and use English word stress sentence stress intonation patterns and high frequency vowels and consonants.
以历史性字母组合hw-开头的英语单词不是太多了，然而使用频率很高的单词which,when,what,why以及where (where和这组词有点不同)仍然不允许我们忘记它们的存在。
English words with the historical initial hw - are not too many; yet the highly frequent which, when, what, why, and where (who stands somewhat apart from this group) do not allow us to forget them.
一些单词的使用频率太低，没有必要收入词典。
eg:Some words are too infrequent to be worthy of inclusion in the dictionary.
该公司根据使用频率、上下文用法以及出现情况统计了媒体报道中的单词、词组以及各个概念。
It tracks words, phrases and concepts in relation to their frequency, contextual usage and appearance in media outlets, according to the firm.
我们采用了基于词熵的特征项提取方法，并且使用特征项单词出现频率来表示向量，推导出相应的贝叶斯计算公式。
We adopt a way of attribute selection based on word entropy, use vectors which are represented by word frequency, and deduce its corresponding Bayesian formula.
我们采用了基于词熵的特征项提取方法，并且使用特征项单词出现频率来表示向量，推导出相应的贝叶斯计算公式。
We adopt a way of attribute selection based on word entropy, use vectors which are represented by word frequency, and deduce its corresponding Bayesian formula.
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