inflexible vs mild

inflexible

adj
  • Not flexible; not capable of bending or being bent. 

  • Not willing to change, e.g. one's opinion or habits. 

  • Not able to be changed or adapted to circumstances. 

mild

adj
  • Acting gently and without causing harm. 

  • 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. 

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

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