cupboard vs storage room

cupboard

noun
  • A cabinet, closet, or other piece of furniture with shelves intended for storing cookware, dishware, or food; similar cabinets or closets used for storing other items. 

verb
  • To collect, as into a cupboard; to hoard. 

storage room

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