go by vs surmise

go by

verb
  • To follow; to assume as true for the purposes of making a decision, taking an action, etc. 

  • To pass or go past without much interaction. 

  • To be called, to use as a name. 

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 go by and surmise occurred in a corpus of books? (source: Google Ngram Viewer )