song vs stanza

song

noun
  • Poetical composition; poetry; verse. 

  • A low price, especially one under the expected value; chiefly in for a song. 

  • A melodious sound made by a bird, insect, whale or other animal. 

  • A musical composition with lyrics for voice or voices, performed by singing. 

  • An object of derision; a laughing stock. 

  • The distinctive sound that a male bird utters to attract a mate or to protect his territory; contrasts with call; also, similar vocalisations made by female birds. 

  • Any musical composition. 

  • The act or art of singing. 

stanza

noun
  • A unit of a poem, written or printed as a paragraph; equivalent to a verse. 

  • An XML element which acts as basic unit of meaning in XMPP. 

  • An apartment or division in a building. 

  • A segment; a portion of a broadcast devoted to a particular topic. 

  • A period; an interval into which a sporting event is divided. 

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