gravelly vs sibilant

gravelly

adj
  • Of a voice: unpleasantly harsh or rasping. 

  • Caused by or involving gravel (“kidney stones”). 

  • Full of, covered with, or similar to gravel or pebbles. 

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 gravelly and sibilant occurred in a corpus of books? (source: Google Ngram Viewer )