attrit vs attrition

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. 

attrition

verb
  • To undergo a reduction in number. 

  • To reduce the number of (jobs or workers) by not hiring new employees to fill positions that become vacant (often with out). 

  • To grind or wear down through friction. 

noun
  • A gradual, natural reduction in membership or personnel, as through retirement, resignation, or death. 

  • Grinding down or wearing away by friction. 

  • Imperfect contrition or remorse. 

  • The gradual reduction in a tangible or intangible resource due to causes that are passive and do not involve productive use of the resource. 

  • The loss of participants during an experiment. 

  • The wearing of teeth due to their grinding. 

  • The loss of a first or second language or a portion of that language. 

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