habitat vs home ground

habitat

noun
  • A place in which a person lives. 

  • Conditions suitable for an organism or population of organisms to live. 

  • A terrestrial or aquatic area distinguished by geographic, abiotic and biotic features, whether entirely natural or semi-natural. 

  • A place or type of site where an organism or population naturally occurs. 

home ground

noun
  • an area or place where one feels familiar or at home. 

  • a sports team's own ground, which is used for their home games. 

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