Pioneer vs Rouse

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. 

Rouse

name

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

  • A surname. 

  • An unincorporated community in the town of Anderson, Iron County, Wisconsin. 

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