attrit vs vitiate

attrit

verb
  • To be reduced in quantity through attrition. 

  • To lose, or to kill, troops by attrition due to sustained firepower. 

  • To engage in attrition; to quit or drop out. 

  • To wear down through attrition, especially mechanical attrition. 

noun
  • One who voluntarily or involuntarily leaves a company; a termed employee. 

vitiate

verb
  • To spoil, make faulty; to reduce the value, quality, or effectiveness of something. 

  • To make something ineffective, to invalidate. 

  • To debase or morally corrupt. 

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