Clever vs Gasconade

Clever

name
  • A city in Missouri. 

Gasconade

name
  • the Gasconade River, a river in Missouri which flows into the Missouri River near the above town. 

  • A small city in Gasconade County, Missouri, United States, named after the Gasconade River. 

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