reliance vs unconfidence

reliance

noun
  • A person or thing which relies on another. 

  • The condition of being reliant or dependent. 

  • The act of relying (on or in someone or something); trust. 

unconfidence

noun
  • Absence of confidence; uncertainty; doubt. 

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