gainword vs learned borrowing

gainword

noun
  • A word that a language has borrowed from other languages. In the process, the spelling and pronunciation, and even meaning, may be altered. 

learned borrowing

noun
  • A word or other linguistic form borrowed from one language into another on purpose instead of through normal language contact, especially one from a classical language. 

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