House of Commons vs longhouse

House of Commons

name

  • The lower house of the Canadian Parliament. 

  • The lower house of the British Parliament; a session of the house. 

noun

  • An outhouse: an outbuilding used as a lavatory. 

longhouse

noun

  • A long communal housing of the Iroquois and some other American Indians, the Malaysians, the Indonesians, the Vikings, and many other peoples. 

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