blatter vs rat-tat-tat

blatter

noun
  • A sound of rapid motion. 

  • A hard battering of rain. 

  • Blather; foolish talk. 

verb
  • To blather. 

  • To hurry or rush noisily. 

rat-tat-tat

noun
  • Such a sound. 

intj
  • The sound made by knocking on a door with a hard object (such as a door knocker). 

  • The sound made by firing an automatic machine gun. 

How often have the words blatter and rat-tat-tat occurred in a corpus of books? (source: Google Ngram Viewer )