multiply vs reproduce

multiply

verb
  • To breed or propagate. 

  • To grow in number. 

  • To perform multiplication. 

  • To be a factor in a multiplication with (another factor). 

  • To increase the amount, degree or number of (something). 

  • To perform multiplication on (a number). 

adv
  • In many or multiple ways. 

noun
  • An act or instance of multiplying. 

reproduce

verb
  • To generate or propagate offspring or organisms sexually or asexually. 

  • To bring something to mind; to recall. 

  • To produce again; to recreate. 

  • To produce an image or copy of. 

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