choir vs singsong

choir

noun
  • A group of people who sing together; a company of people who are trained to sing together. 

  • The part of a church where the choir assembles for song. 

  • One of the nine ranks or orders of angels. 

  • Set of strings (one per note) for a harpsichord. 

verb
  • To sing in concert. 

singsong

noun
  • An informal gathering at which songs are sung; a singing session. 

  • A drawling or monotonous tone, as of a badly executed song. 

  • Bad singing or poetry. 

  • A piece of verse with a simple, song-like rhythm. 

adj
  • Like a piece of singsong; simple and melodic, varying in pitch (of tone of voice etc.) 

verb
  • To utter in a singsong voice. 

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