Idaho vs ends of the earth

Idaho

noun

  • In full Idaho potato: a variety of potato grown in Idaho, especially the Russet Burbank. 

name

  • A state in the western United States. Capital and largest city: Boise. 

  • An unincorporated community in Pike County, Ohio, United States, named for Idaho Territory. 

  • University of Idaho 

ends of the earth

noun

  • Extremities of the land. 

  • A very remote place. 

  • Distant land. 

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