believe in vs mistrust

believe in

verb
  • To believe that (something) is right or desirable. 

  • To have confidence in the ability or power of. 

  • To ascribe existence to. 

mistrust

verb
  • To suspect, to imagine or suppose (something) to be the case. 

  • To be suspicious. 

  • To have no confidence in (something or someone). 

  • To be wary, suspicious or doubtful of (something or someone). 

noun
  • Lack of trust or confidence; distrust, untrust. 

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