Timbuktu vs boondock

Timbuktu

name
  • Any proverbially distant or remote place. 

  • A city in central Mali. 

boondock

noun
  • A brushy, rural area or location. 

  • A shot that strikes a squopped wink and sends it flying far away. 

verb
  • To stay in a self-contained recreational vehicle without connections to water, electricity, or sewer services, especially in a remote location. 

  • To camp in a dry brushy location. 

  • To strike a squopped wink and send it flying far away. 

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