diffidence vs disinclination

diffidence

noun
  • The state of being diffident, timid or shy; reticence or self-effacement. 

disinclination

noun
  • The state of being disinclined; want of propensity, desire, or affection; slight aversion or dislike 

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