Chinook vs Chinookan language

Chinook

name
  • A Native American language of the Penutian family of Oregon and Washington. 

  • Chinook Jargon, a pidgin trade language of the Pacific Northwest composed primarily of words from Chinook proper, English, and French, with some borrowings from other languages. 

  • A city, the county seat of Blaine County, Montana, United States. 

noun
  • A member of a Native American people whose traditional tribal grounds were along the lower and middle Columbia River. 

Chinookan language

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