Dr vs physician

Dr

noun
  • Doctor, a title used before a doctor's name or surname (Dr Jane Doe, Dr Doe) 

  • debitor 

  • debit 

  • drive, used in street names 

physician

noun
  • A medical doctor trained in human medicine. 

  • A practitioner of physic, i.e. a specialist in internal medicine, especially as opposed to a surgeon; a practitioner who treats with medication rather than with surgery. 

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