kibbutz vs rancheria

kibbutz

noun
  • A community, usually an agricultural one in Israel, based on a high level of social and economical sharing, equality, direct democracy and tight social relations. 

rancheria

noun
  • A political division of the native tribes. 

  • A small settlement in the Americas, especially of Native Americans. 

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