coverall vs garment

coverall

noun
  • A loose-fitting protective garment worn over other clothing. 

garment

noun
  • A single item of clothing. 

  • The visible exterior in which a thing is invested or embodied. 

verb
  • To clothe in a garment. 

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