holistic vs substratal

holistic

adj
  • Relating to a study of the whole instead of a separation into parts. 

  • Related to holism. 

substratal

adj
  • Of or pertaining to a substratum. 

  • Specifically, pertaining to a substrate language. 

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