cracked vs sibilant

cracked

adj
  • Crazy; crackpot. 

  • Extremely good at something (usually a video game). 

  • Broken into coarse pieces. 

  • Harsh or dissonant. 

  • Broken so that cracks appear on, or under, the surface. 

sibilant

adj
  • Characterized by a hissing or hushing sound such as the s or sh in sack or shack. 

noun
  • A consonant having a hissing or hushing sound such as the s or sh in sack or shack. 

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