vantage point vs viewpoint

vantage point

noun
  • A point of view; perspective; outlook; standpoint. 

  • A camera angle. 

  • A place or position affording a good view. 

viewpoint

noun
  • An angle, outlook or point of view. 

  • The position from which something is observed or considered 

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