mirth vs rec

mirth

noun
  • The emotion usually following humour and accompanied by laughter; merriment; jollity; gaiety. 

  • That which causes merriment. 

rec

noun
  • A recreation ground. 

  • A recommendation or suggestion. 

verb
  • To recommend. 

  • To record. 

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