fire-raiser vs pyro

fire-raiser

noun

  • An arsonist. 

pyro

noun

  • Pyrotechnician. 

  • Pyrotechnics. 

  • A pyromaniac. 

  • Pyrocellulose. 

adj

  • Pyrotechnic. 

  • Pyromaniac, pyromaniacal. 

How often have the words fire-raiser and pyro occurred in a corpus of books? (source: Google Ngram Viewer )