dependency vs reliance

dependency

noun
  • Something dependent on, or subordinate to, something else 

  • Reliance on the functionality provided by some other, external component. 

  • A colony, or a territory subject to rule by an external power. 

  • A state of dependence; a refusal to exercise initiative. 

  • An external component whose functionality is relied on. 

  • A dependence on a habit-forming substance such as a drug or alcohol. 

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. 

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