Shoah vs pogrom

Shoah

name
  • The systematic mass murder of six million Jews perpetrated by Nazi Germany shortly before and during World War II. 

pogrom

noun
  • A riot aimed at persecution or massacre of a particular ethnic or religious group, usually Jews. 

  • An antisemitic hate crime with a large death toll, irrespective of the number of perpetrators. 

verb
  • To persecute or massacre a particular group of people. 

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