lover vs smooth operator

lover

noun
  • One who loves and cares for another person in a romantic way; a sweetheart, love, soulmate, boyfriend, girlfriend, or spouse. 

  • A person who loves something. 

  • An informal term of address for any friend. 

  • A sexual partner, especially one with whom someone is having an affair. 

smooth operator

noun
  • A person who accomplishes tasks with efficiency and grace, especially one with verbal skills who is persuasive in interpersonal relationships, negotiation, etc. 

  • A skillful, manipulative person, con artist, or clever scoundrel. 

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