playing vs singing

playing

noun
  • An occasion on which something, such as a song or show, is played. 

singing

noun
  • A gathering for the purpose of singing shape note songs. 

  • The act of using the voice to produce musical sounds; vocalizing. 

  • Disclosing information, or giving evidence about another. 

adj
  • Producing a whistling sound due to the escape of steam. 

  • Smooth and flowing. 

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