maa vs shrill

maa

verb
  • To make such a sound. 

intj
  • A bleating sound, as that of a sheep or goat. 

shrill

verb
  • To make a shrill noise. 

noun
  • A shrill sound. 

adj
  • Sharp or keen to the senses. 

  • Having a shrill voice. 

  • Fierce, loud, strident. 

  • High-pitched and piercing. 

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