libretto vs text

libretto

noun
  • A book containing such a text. 

  • The text of a dramatic musical work, such as an opera. 

text

noun
  • A book, tome or other set of writings. 

  • A verse or passage of Scripture, especially one chosen as the subject of a sermon, or in proof of a doctrine. 

  • A writing consisting of multiple glyphs, characters, symbols or sentences. 

  • A style of writing in large characters; also, a kind of type used in printing. 

  • A brief written message transmitted between mobile phones. 

  • Data which can be interpreted as human-readable text. 

  • Anything chosen as the subject of an argument, literary composition, etc. 

verb
  • To send a text message to; i.e. to transmit text using the Short Message Service (SMS), or a similar service, between communications devices, particularly mobile phones. 

  • To send and receive text messages. 

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