neon vs usherdom

neon

noun
  • Neon signs or lights, collectively. 

  • The chemical element (symbol Ne) with an atomic number of 10. The second of the noble gases, it is a colourless, odorless inert gas. 

  • A neon tetra fish. 

  • A form or sample of the element. 

adj
  • That resembles a neon light; extremely bright; fluorescent 

usherdom

noun
  • Ushers, collectively. 

  • The office or position of an usher. 

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