offprint vs speller

offprint

noun
  • A reproduction of a single article from a journal or similar publication. 

verb
  • To reprint as an excerpt. 

speller

noun
  • A book used to learn how to spell properly. 

  • A person who spells. 

  • A spell checker. 

  • A participant in a spelling bee. 

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