painting vs underdrawing

painting

noun
  • An illustration or artwork done with the use of paint. 

  • The same activity as an art form. 

  • The action of applying paint to a surface. 

underdrawing

noun
  • A sketch done on the ground of a painting before paint is applied 

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