foretaste vs test piece

foretaste

verb
  • To taste before possession; have previous experience of; enjoy by anticipation. 

  • To taste beforehand. 

  • To taste before another. 

noun
  • A sample taken in anticipation; an experience undergone in advance. 

  • A taste beforehand. 

test piece

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