mezzanine vs monotone

mezzanine

adj
  • Fulfilling an intermediate or secondary function. 

  • Characteristic of or relating to high-interest loans which have no collateral, and are regarded as intermediate in nature, ranking above equity but below secured loans. 

verb
  • To fit (a building or other place) with a mezzanine floor. 

noun
  • An intermediate floor or storey in between the main floors of a building; specifically, one that is directly above the ground floor which does not extend over the whole floorspace of the building, and so resembles a large balcony overlooking the ground floor; an entresol. 

  • An apartment, room, etc., on such an intermediate floor. 

  • The lowest balcony in an auditorium, cinema, theatre, etc.; the dress circle. 

monotone

adj
  • Being, or having the salient properties of, a monotone function. 

  • Having a single unvaried pitch. 

noun
  • A piece of writing in one strain throughout. 

  • A single unvaried tone of speech or a sound. 

verb
  • To speak in a monotone. 

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