Old Master vs artist

Old Master

noun
  • Any of various early European painters whose works are regarded as superlative. 

  • A painting by an Old Master. 

artist

noun
  • A person who creates art as an occupation. 

  • A person who creates art. 

  • A person who is skilled at some activity. 

  • A recording artist. 

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