vestment vs workwear

vestment

noun
  • Clothing. 

  • Any of the special articles of clothing worn by members of the clergy etc., especially a garment worn at the celebration of the Eucharist. 

  • A robe, gown, or other article of clothing worn as an indication of office. 

workwear

noun
  • Clothes designed to be worn while working, especially in a physically demanding job. 

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