对于每个长于两字符的单词，将统计数存储在频率映射中。

For each word that is longer than two characters, it stores the count in the frequency map.

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清单3展示了相同的代码，但是添加了测试单词字符串长度和频率的逻辑。

Listing 3 shows the same code with logic added that tests for word string length and frequency.

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正则表达式用来基于字符、频率和字符顺序定义字符串中的模式。

Regular expressions are used to define patterns in strings based on characters, frequency, and character order.

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