speller vs tome

speller

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

  • A person who spells. 

  • A spell checker. 

  • A participant in a spelling bee. 

tome

noun
  • A large or scholarly book. 

  • One in a series of volumes. 

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