assemblage vs readership

assemblage

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

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

  • A gathering of people. 

readership

noun
  • The collected readers of a publication. 

  • The role or office of a reader. 

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