compendium vs speller

compendium

noun
  • A collection of board games packaged in a single box. 

  • A short, complete summary; an abstract. 

  • A collected body of information on the standards of strength, purity, and quality of drugs. 

  • A list or collection of various items. 

speller

noun
  • A person who spells. 

  • A spell checker. 

  • A participant in a spelling bee. 

  • A book used to learn how to spell properly. 

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