apparel vs backstair

apparel

noun
  • Clothing. 

  • A small ornamental piece of embroidery worn on albs and some other ecclesiastical vestments. 

  • The furniture of a ship, such as masts, sails, rigging, anchors, guns, etc. 

  • Aspect, guise, form. 

verb
  • To dress or clothe; to attire. 

  • To dress with external ornaments; to cover with something ornamental 

  • To furnish with apparatus; to equip; to fit out. 

backstair

noun
  • The backstairs (stairs at the rear of a building). 

adj
  • clandestine, secret or furtive 

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