attrit vs constraint

attrit

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

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. 

constraint

noun
  • An irresistible force or compulsion. 

  • A condition that a solution to an optimization problem must satisfy. 

  • A linkage or other restriction that maintains database integrity. 

  • The repression of one's feelings. 

  • Something that constrains; a restriction. 

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