| 单词 | infrequency | 
| 释义 | infrequencynoun  in·fre·quen·cy  (ˌ)in-ˈfrē-kwən(t)-sē    : rarity of occurrence   infrequency nounas in unusualness Synonyms & Similar Words Relevance 
 Antonyms & Near Antonyms 
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