designation vs turn of phrase

designation

noun
  • signification, meaning, for example of a word or phrase. 

  • Selection and appointment for a purpose or office; allotment; direction. 

  • An act or instance of designating; a pointing out or showing; indication. 

  • That which designates; a distinguishing mark or name; distinctive title; appellation. 

turn of phrase

noun
  • An expression which is worded in a distinctive way, especially one which is particularly memorable or artful. 

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