con vs lower chamber

con

noun
  • An organized gathering, such as a convention, conference, or congress. 

  • The conversion of part of a building. 

  • A fraud; something carried out with the intention of deceiving, usually for personal, often illegal, gain. 

  • A convicted criminal, a convict. 

  • A disadvantage of something, especially when contrasted with its advantages (pros). 

  • A political conservative. 

verb
  • To trick or defraud, usually for personal gain. 

  • To study or examine carefully, especially in order to gain knowledge of; to learn, or learn by heart. 

lower chamber

noun
  • The lower legislative chamber in a bicameral legislature; in many cases, the one that is directly elected and/or has more practical power, such as the power to raise and spend money. 

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