loanword vs transliteration

loanword

noun
  • A word directly taken into one language from another one with little or no translation. 

transliteration

noun
  • The act or product of transliterating, of representing letters or words in the characters of another alphabet or script. 

  • The act or product of rendering speech in sign language, or vice versa. 

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