Leninist vs social-democrat

Leninist

adj
  • Of or relating to Leninism. 

  • Of or relating to Vladimir Lenin (Russian: Влади́мир Ильи́ч Ле́нин), a Russian revolutionary and politician. 

noun
  • A person who follows or supports Lenin or the philosophy of Leninism. 

social-democrat

How often have the words Leninist and social-democrat occurred in a corpus of books? (source: Google Ngram Viewer )