barfly vs boozer

barfly

noun
  • a person who spends much time in a bar or similar drinking establishment 

  • a promiscuous person, especially a woman, who frequents bars hoping to find sexual partners 

boozer

noun
  • One who drinks habitually; a drunkard. 

  • A vehicle equipped with tanks for supplying water to remote locations. 

  • A public house, pub. 

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