word-frequency的用法和樣例：
例句
- This transformation is useful for creating a custom word list based on the input text, complete with word frequency statistics.
此轉換對於創建基於輸入文本並帶有詞頻統計信息的自定義詞列表很有用。 - The results have shown in expository text reading, there was word frequency effect and word class effect on fixation duration and fixation pattern.
實驗結果發現，詞頻及辭彙類型對讀者眼球運動型態的影響，會因文體不同而有不同。
