Timbuktu vs wop-wops

Timbuktu

name
  • Any proverbially distant or remote place. 

  • A city in central Mali. 

wop-wops

noun
  • An out of the way place; the boondocks or backcountry. 

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