local government vs upper chamber

local government

noun
  • Any form of government whose remit covers an area less than that of the nation and, in some cases, less than that of a state. 

upper chamber

noun
  • The upper legislative chamber in a bicameral legislature; usually smaller and having more restricted power than the lower chamber. 

How often have the words local government and upper chamber occurred in a corpus of books? (source: Google Ngram Viewer )