Bug vs greyhound

Bug

noun
  • A Bugatti car. 

  • A Volkswagen Beetle car. 

name
  • A river flowing northwest 450 miles between Belarus and Poland. 

  • A river in Ukraine (Southern Bug), flowing 530 miles to the Dnieper estuary. 

greyhound

noun
  • A lean breed of dog used in hunting and racing. 

  • A highball cocktail of vodka and grapefruit juice. 

verb
  • To leap rapidly across the surface of the water. 

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