insignificancy vs parvenu

insignificancy

noun
  • An insignificant person or thing. 

  • Unimportance, insignificance. 

parvenu

noun
  • A person who has risen, climbed up, or has been promoted to a higher social class, especially through acquisition of wealth, privileges, or political authority but has not gained social acceptance by those within that new class. 

adj
  • Being a parvenu; also, like, having the characteristics of, or associated with a parvenu. 

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