hobby vs rec

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 

rec

noun
  • A recreation ground. 

  • A recommendation or suggestion. 

verb
  • To recommend. 

  • To record. 

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