propagate vs reduce

propagate

verb
  • To generate; to produce. 

  • To cause to take effect on all relevant devices in a network. 

  • To spread from person to person; to extend the knowledge of; to originate and spread; to carry from place to place; to disseminate. 

  • To produce young; to be produced or multiplied by generation, or by new shoots or plants. 

  • To cause to spread to extend; to impel or continue forward in space. 

  • To cause to continue or multiply by generation, or successive production. 

  • To take effect on all relevant devices in a network. 

reduce

verb
  • To humble; to conquer; to subdue; to capture. 

  • To annul by legal means. 

  • To convert to written form. (Usage note: this verb almost always appears as "reduce to writing".) 

  • To lose weight. 

  • To perform a reduction; to restore a fracture or dislocation to the correct alignment. 

  • To bring to an inferior state or condition. 

  • To simplify an equation or formula without changing its value. 

  • To bring to an inferior rank; to degrade, to demote. 

  • To convert a syllogism to a clearer or simpler form. 

  • To add electrons / hydrogen or to remove oxygen. 

  • To bring down the size, quantity, quality, value or intensity of something; to diminish, to lower. 

  • To strike off the payroll. 

  • To decrease the liquid content of food by boiling much of its water off. 

  • To produce metal from ore by removing nonmetallic elements in a smelter. 

  • To express the solution of a problem in terms of another (known) algorithm. 

  • To reform a line or column from (a square). 

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