posit vs suppose

posit

verb
  • Assume the existence of; to postulate. 

  • Propose for consideration or study; to suggest. 

  • Put (something somewhere) firmly; to place or position. 

noun
  • Something that is posited; a postulate. 

suppose

verb
  • To require to exist or to be true; to imply by the laws of thought or of nature. 

  • To put by fraud in the place of another. 

  • To theorize or hypothesize. 

  • To take for granted; to conclude, with less than absolute supporting data; to believe. 

  • To imagine; to believe; to receive as true. 

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