turn of phrase vs vocabulary

turn of phrase

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

vocabulary

noun
  • A range of artistic or stylistic forms or techniques. 

  • The collection of words a person knows and uses. 

  • The stock of words used in a particular field. 

  • A usually alphabetized and explained collection of words e.g. of a particular field, or prepared for a specific purpose, often for learning. 

  • The words of a language collectively; lexis. 

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