Hickman vs Hitchman

Hickman

name

  • A census-designated place in Stanislaus County, California, United States. 

  • A city, the county seat of Fulton County, Kentucky, United States. 

  • A surname. 

noun

  • A Hickman line. 

Hitchman

name

  • A surname. 

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