goods and services tax vs value added tax

goods and services tax

noun
  • A tax very similar to the value added tax, levied, for example, in Australia, Canada, New Zealand, and Singapore. 

value added tax

noun
  • A tax levied on the added value that results from the exchange of goods and services 

How often have the words goods and services tax and value added tax occurred in a corpus of books? (source: Google Ngram Viewer )