mediate vs surmise

mediate

verb
  • To act as an intermediary causal or communicative agent; to convey. 

  • To divide into two equal parts. 

  • To intervene between conflicting parties in order to resolve differences or bring about a settlement. 

  • To resolve differences, or to bring about a settlement, between conflicting parties. 

  • To act as a spiritualistic medium. 

adj
  • Gained or effected by a medium or condition. 

  • Acting through a mediating agency, indirect. 

  • Intermediate between extremes. 

surmise

verb
  • To imagine or suspect; to conjecture; to posit with contestable premises. 

noun
  • Thought, imagination, or conjecture, which may be based upon feeble or scanty evidence; suspicion; guess. 

  • Reflection; thought; posit. 

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