typewriter vs typist

typewriter

noun
  • A device, at least partially mechanical, used to print text by pressing keys that cause type to be impressed through an inked ribbon onto paper. 

  • A prank in which fingers are jabbed roughly onto someone's chest followed by striking them over the ear in imitation of using an old-fashioned typewriter. 

typist

noun
  • A person who types, a clerical worker who writes letters, etc., using a typewriter. 

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