prolongated vs sesquipedalian

prolongated

adj

  • prolonged 

sesquipedalian

adj

  • Pertaining to or given to the use of overly long words. 

  • Long; polysyllabic. 

noun

  • A long word. 

  • A person who uses long words. 

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