apathy vs hobby

apathy

noun
  • Lack of emotion or motivation; lack of interest or enthusiasm towards something; disinterest (in something). 

hobby

noun
  • An activity that one enjoys doing in one's spare time. 

  • Any of four species of small falcons in the genus Falco, especially Falco subbuteo. 

  • An extinct breed of horse native to the British Isles, also known as the Irish Hobby 

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