hissy vs sibilous

hissy

adj

  • Making a hissing sound. 

  • Accompanied with hisses. 

  • Childish or petulant. 

noun

  • A tantrum, a fit. 

sibilous

adj

  • Having a hissing sound; sibilant. 

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