generalisation vs supposal

generalisation

noun
  • Inductive reasoning from detailed facts to general principles. 

  • The formulation of general concepts from specific instances by abstracting common properties. 

supposal

noun
  • Something supposed; a supposition, a hypothesis. 

  • The act of supposing; supposition. 

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