hamlet vs trading post

hamlet

noun
  • A small village or a group of houses. 

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

  • A village that does not have its own church. 

trading post

noun
  • A place where trading of goods takes place. 

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