know vs sing

know

verb
  • To be able to play or perform (a song or other piece of music). 

  • To perceive the truth or factuality of; to be certain of or that. 

  • To experience. 

  • To understand or have a grasp of through experience or study. 

  • To be or become aware or cognizant. 

  • To be acquainted or familiar with; to have encountered. 

  • To be aware of; to be cognizant of. 

  • To recognize as the same (as someone or something previously encountered) after an absence or change. 

  • To have knowledge; to have information, be informed. 

noun
  • Knowledge; the state of knowing. 

  • Knowledge; the state of knowing; now confined to the fixed phrase ‘in the know’ 

sing

verb
  • To be capable of being sung; to produce a certain effect by being sung. 

  • To display fine qualities; to stand out as excellent. 

  • To soothe with singing. 

  • To confess under interrogation. 

  • In traditional Aboriginal culture, to direct a supernatural influence on (a person or thing), usually malign; to curse. 

  • To produce a 'song', for the purposes of defending a breeding territory or to attract a mate. 

  • To produce any type of melodious vocalisation. 

  • To produce musical or harmonious sounds with one’s voice. 

  • To express audibly by means of a harmonious vocalization. 

  • To make a small, shrill sound. 

  • To perform a vocal part in a musical composition, regardless of technique. 

  • To relate in verse; to celebrate in poetry. 

noun
  • The act, or event, of singing songs. 

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