STW:regular expression

Common Discussion
Regular may be translted into the following:


 * 正規
 * 正則
 * 規則

Expression may be translted into the following:


 * 表示式
 * 表示法
 * 表達式
 * 運算式

Google Search Results
So there are twelve combinations for Regular Expression. We use Google to discover the popularity of each translation.