person-to-person vs plainspoken

person-to-person

adj
  • Such that the caller is only connected and charged if the person he specified is available to speak. 

  • Such that the lender and borrower are individuals rather than companies. 

plainspoken

adj
  • Speaking plainly or simply. 

How often have the words person-to-person and plainspoken occurred in a corpus of books? (source: Google Ngram Viewer )