big screen vs filmmaking

big screen

noun
  • The large viewing surface upon which films are projected in a cinema. 

  • movies, or that which is related to movies or cinema. 

filmmaking

noun
  • The manufacture of physical film. 

  • The activity of preparing edited video works, formerly principally films, whether for entertainment or other purposes. 

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