diffident vs humble

diffident

adj
  • Lacking self-confidence; timid; modest 

humble

adj
  • Having a low opinion of oneself; not proud, arrogant, or assuming; modest. 

  • Not pretentious or magnificent; unpretending; unassuming. 

verb
  • To make humble or lowly; to make less proud or arrogant; to make meek and submissive. 

  • To defeat or reduce the power, independence, or pride of 

noun
  • An arrest based on weak evidence intended to demean or punish the subject. 

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