Virgo vs star sign

Virgo

noun
  • Someone with a Virgo star sign 

name
  • The zodiac sign for the virgin, ruled by Mercury, that covers August 23 – September 23 (tropical astrology) or September 16 – October 15 (sidereal astrology). 

  • A constellation in the zodiac, imagined in the shape of a maiden, that contains the bright binary star Spica. 

  • A surname. 

star sign

noun
  • Any of the twelve astrological signs. 

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