depot vs storeroom

depot

noun
  • A storage facility, in particular, a warehouse. 

  • A bus station or railway station. 

  • A place where recruits are assembled before being sent to active units. 

  • A storage space for public transport and other vehicles where they can be maintained and from which they are dispatched for service 

  • A place for the storage, servicing or upgrade of military hardware. 

  • The portion of a regiment that remains at home when the rest go on foreign service. 

  • The tableau; the area where cards can be arranged in solitaire or patience games. 

storeroom

noun
  • A room used for storage. 

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