inhibition vs lack of self-confidence

inhibition

noun
  • A recusal. 

  • A writ from a higher court to an inferior judge to stay proceedings. 

  • The act of inhibiting. 

  • A personal feeling of fear or embarrassment that stops one behaving naturally. 

  • The process of stopping or retarding a reaction. 

lack of self-confidence

How often have the words inhibition and lack of self-confidence occurred in a corpus of books? (source: Google Ngram Viewer )