Holocaust vs Shoah

Holocaust

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

  • The systematic mass murder (democide) of eleven million people, namely six million Jews and five million others (including Romanis, Slavs, homosexuals, and people with physical and mental disabilities), perpetrated by Nazi Germany shortly before and during World War II. 

Shoah

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

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