adverb vs enigma

adverb

noun
  • A word that modifies a verb, adjective, other adverbs, or various other types of words, phrases, or clauses. 

  • In the Raku programming language, a named parameter that modifies the behavior of a routine. 

  • A word that modifies a verb, adjective, other adverbs, or various other types of words, phrases, or clauses. (modifying a verb) 

verb
  • To make into or become an adverb. 

enigma

noun
  • A riddle, or a difficult problem. 

  • A species of grasshopper, Oedaleonotus enigma. 

  • Mysteriousness; obscurity; lack of clarity. 

  • The Talaud kingfisher, Todiramphus enigma. 

  • A rare species of moth, Heliothis enigma. 

  • A style of literature characterized by obscurity and hints of transcendental meaning. 

  • Something or someone puzzling, mysterious or inexplicable. 

  • A protein with three LIM domains (a conserved cysteine- and histidine-rich structure of two adjacent zinc fingers) at the C terminus that regulates protein phosphorylation. 

  • Riddles and puzzles, collectively. 

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