mild vs mordacious

mild

adj
  • Not sharp or bitter; not strong in flavor. 

  • Of only moderate severity; not strict. 

  • Not serious or dangerous. 

  • Moderately warm, especially less cold than expected. 

  • Gentle and not easily angered. 

  • Not overly felt or seriously intended. 

  • Acting gently and without causing harm. 

noun
  • A relatively low-gravity beer, often with a dark colour; mild ale 

mordacious

adj
  • sharp or caustic in style or tone. 

  • Prone to biting, aggressive (of an animal etc.). 

  • Sharp in intent, sarcastic 

  • Biting, causing a physical bite or sting; corrosive 

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