astrologer vs augur

astrologer

noun
  • One who studies or practices astrology. 

augur

noun
  • A diviner who foretells events by the behaviour of birds or other animals, or by signs derived from celestial phenomena, or unusual occurrences. 

  • An official who interpreted omens before the start of public events. 

verb
  • To foretell events; to exhibit signs of future events; to indicate a favorable or an unfavorable outcome. 

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