abrade vs attrit

abrade

verb
  • To rub or wear off; erode. 

  • To cause the surface to become more rough. 

  • To undergo abrasion. 

  • To wear down or exhaust, as a person; irritate. 

  • To irritate by rubbing; chafe. 

attrit

verb
  • To wear down through attrition, especially mechanical attrition. 

  • 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. 

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

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