American vs septic tank

American

noun
  • Any inhabitant of the Americas. 

  • A citizen or inhabitant of British North America. 

  • The dialect of English spoken in and around the contiguous United States of America. 

  • A citizen or inhabitant of the United States of America. 

  • American cheese. 

adj
  • Of, from, or pertaining to the Americas. 

  • Of, from, or pertaining to the United States of America, its people, or its culture. 

  • Able to be exercised on any date between its issue and expiry. 

  • Of, from, or pertaining to British North America. 

septic tank

noun
  • Yank (American person). 

  • A small-scale watertight treatment system for domestic sewage in which the flow is slowed to allow sedimentation and sludge digestion by bacteria to take place. 

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