Cambrian vs Welshman

Cambrian

noun
  • Synonym of Walian: a Welsh person, a Welshman or Welshwoman. 

adj
  • Of a geologic period within the Paleozoic era; comprises lower, middle and Furongian epochs from about 542 to 490 million years ago. 

  • Of or relating to Wales. 

name
  • The Cambrian period. 

Welshman

noun
  • A man who is a native or inhabitant of Wales. 

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