ear-piercing vs sibilant

ear-piercing

adj

  • Extremely loud (of sound). 

noun

  • A piercing in the ear. 

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