roaring vs sibilant

roaring

noun
  • A loud, deep, prolonged sound, as of a large beast; a roar. 

  • An affection of the windpipe of a horse, causing a loud, peculiar noise in breathing under exertion. 

adj
  • Intensive; extreme. 

  • Very successful; lively. 

sibilant

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

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

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