physiology vs structure

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. 

structure

noun
  • The overall form or organization of something. 

  • The underlying shape of a solid. 

  • Underwater terrain or objects (such as a dead tree or a submerged car) that tend to attract fish 

  • A body, such as a political party, with a cohesive purpose or outlook. 

  • A cohesive whole built up of distinct parts. 

  • A set along with a collection of finitary functions and relations. 

  • Several pieces of data treated as a unit. 

  • A set of rules defining behaviour. 

verb
  • To give structure to; to arrange. 

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