insincerity vs lying

insincerity

noun
  • Property of being insincere, lacking sincerity or truthfulness. 

lying

noun
  • An act of telling a lie or falsehood. 

  • The act of one who lies, or keeps low to the ground. 

adj
  • Tending to tell lies, untruthful, mendacious 

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