exam paper vs test paper

exam paper

noun
  • A piece of paper on which the questions or tasks of an examination are written. 

  • A piece of paper on which examination candidates are expected to write their answers. 

test paper

noun
  • a paper submitted by a student for academic examination 

  • An instrument admitted as a standard or comparison of handwriting in those jurisdictions in which comparison of hands is permitted as a mode of proving handwriting. 

  • a small piece of paper impregnated with a chemical indicator for making qualitative tests 

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