morphology vs zoology

morphology

noun
  • The study of the form and structure of animals and plants. 

  • The study of the internal structure of morphemes (words and their semantic building blocks). 

  • The form and structure of something. 

  • Mathematical morphology. 

  • The study of the structure of rocks and landforms. 

  • A description of the form and structure of something. 

zoology

noun
  • The part of biology relating to the animal kingdom, including the structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct. 

  • A treatise on this science. 

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