hamlet vs municipality

hamlet

noun
  • A village that does not have its own church. 

  • A small village or a group of houses. 

  • Any of the fish of the genus Hypoplectrus in the family Serranidae. 

municipality

noun
  • A district with a government that typically encloses no other governed districts; a borough, city, or incorporated town or village. 

  • The governing body of such a district. 

  • In Mexico and other Spanish- and Portuguese-speaking countries, second-level administrative divisions that may house one or more cities or towns whose head of government may be called mayors or, in Mexico, municipal presidents. 

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