physiology vs pomology

physiology

noun
  • A branch of biology that deals with the functions and activities of life or of living matter (as organs, tissues, or cells) and of the physical and chemical phenomena involved. 

pomology

noun
  • A work or treatise written on this subject. 

  • The study of pome fruit and of the cultivation of such fruit. 

  • The study of fruit in general and of the cultivation of fruit. 

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