paper trail vs testimony

paper trail

noun
  • A written record, history, or collection of evidence. 

  • Records left by a person or organization in the course of activities. 

  • Physical evidence of something that occurred in the past. 

testimony

noun
  • Witness; evidence; proof of some fact. 

  • Statements made by a witness in court. 

  • In a church service (or religious service), a personal account, such as one's conversion, testimony of faith, or life testimony. 

  • An account of first-hand experience. 

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