antipyretic vs antipyrexic

antipyretic

noun

  • A medicine that reduces fever; a febrifuge. 

adj

  • That reduces fever. 

antipyrexic

noun

  • Synonym of antipyretic 

adj

  • Synonym of antipyretic 

How often have the words antipyretic and antipyrexic occurred in a corpus of books? (source: Google Ngram Viewer )