Bolshevist vs leftist

Bolshevist

leftist

adj
  • Of or pertaining to the political left. 

noun
  • Someone who holds socialist or communist-leaning economic views, usually alongside progressive social views; an anticapitalist. 

  • A person who holds views associated with the political left. 

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