Mother Nature vs Terra

Mother Nature

name
  • A personification of nature as woman, stressing fertility and fecundity. Based upon either goddesses of the earth and nature, Gaia, Rhea, or Demeter. 

Terra

name
  • The Roman earth goddess, equivalent in the interpretatio graeca to Gaea. 

  • The planet Earth. 

  • A female given name. 

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