mistrust vs scruple

mistrust

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

  • To be suspicious. 

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

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

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

scruple

verb
  • To regard with suspicion; to question. 

  • To excite scruples in; to cause to scruple. 

  • To hesitate or be reluctant to act due to considerations of conscience or expedience. 

noun
  • Hesitation to act from the difficulty of determining what is right or expedient; doubt, hesitation or unwillingness due to motives of conscience. 

  • A weight of ¹⁄₂₈₈ of a pound, that is, twenty grains or one third of a dram, about 1.3 grams (symbol: ℈). 

  • A Hebrew unit of time equal to ¹⁄₁₀₈₀ hour. 

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