Piedmont vs Pioneer

Piedmont

name
  • A city in Alameda County, California, United States. 

  • A region in the north of Italy. 

  • The region of the eastern US between the Appalachian mountains and the coastal plain, extending from eastern Alabama to northern New Jersey. 

Pioneer

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

noun
  • A person born on/before 31 Dec 1949 and possessing Singapore citizenship on/before 31 Dec 1986, given this status and certain benefits to recognise their contributions to Singapore's early development. 

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