vocabulary vs wordage

vocabulary

noun
  • The words of a language collectively; lexis. 

  • The collection of words a person knows and uses. 

  • A range of artistic or stylistic forms or techniques. 

  • 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. 

wordage

noun
  • Words collectively. 

  • The excessive use of words; verbiage. 

  • The number of words used in a text. 

  • The choice of words used; phraseology. 

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