assemblage vs hearership

assemblage

noun
  • A gathering of people. 

  • A visual art form similar to collage, which combines two-dimensional and three-dimensional, often found, elements into works of art. 

  • The process of assembling or bringing together. 

  • A collection of things which have been gathered together or assembled. 

  • A group of different artifacts found in association with one another. 

hearership

noun
  • The state of being a hearer; hearers collectively; audience; listenership. 

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