Bolshevik vs socialist

Bolshevik

noun

  • A Russian communist revolutionary, member of the Bolshevik Party in the 1917 Communist Revolution of Russia. 

  • A member of the Communist Party that ruled the Russian Soviet Federative Socialist Republic and the Union of Soviet Socialist Republics. 

socialist

adj

  • Of, relating to, supporting, or advocating socialism. 

noun

  • One who supports or advocates socialism. 

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