unavailable vs wanting

unavailable

adj
  • Not available. 

noun
  • A communist who operated underground and was therefore not available for a political leadership position. 

wanting

adj
  • Absent or lacking. 

  • Deficient. 

  • That wants or desires. 

prep
  • Without, except, but. 

  • Less, short of, minus. 

noun
  • The state of wanting something; desire. 

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