French kiss vs smooch

French kiss

noun
  • The act or an instance of kissing another person's cheeks in turn as a greeting. 

  • The act or an instance of touching cheeks together in turn as a greeting. 

  • The act or an instance of kissing that involves the use of one's tongue. 

verb
  • To give a French kiss, in its various senses. 

smooch

noun
  • A kiss, especially that which is on the cheek. 

verb
  • To kiss. 

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