assume vs suppose

assume

verb
  • To authenticate by means of belief; to surmise; to suppose to be true, especially without proof 

  • To receive, adopt (a person) 

  • To adopt a feigned quality or manner; to claim without right; to arrogate 

  • To take on a position, duty or form 

  • To adopt (an idea or cause) 

suppose

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

  • 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. 

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