playtime vs rec

playtime

noun
  • A time when children can play outside during the school day. 

  • Time for play or diversion. 

  • A duration of time when one is not as serious as they could be, especially in a conflict of sorts. 

  • The duration of a recording. 

rec

noun
  • A recreation ground. 

  • A recommendation or suggestion. 

verb
  • To recommend. 

  • To record. 

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