enclosure vs railbed

enclosure

noun
  • The act of separating and surrounding an area, domain, or amount of something with a barrier. 

  • The area of a convent, monastery, etc where access is restricted to community members. 

  • An area, domain, or amount of something partially or entirely enclosed by barriers. 

  • The act of enclosing, i.e. the insertion or inclusion of an item in a letter or package. 

  • Something enclosed, i.e. inserted into a letter or similar package. 

  • The act of restricting access to ideas, works of art or technologies using patents or intellectual property laws. 

  • The post-feudal process of subdivision of common lands for individual ownership. 

railbed

noun
  • The substructure of a railway, underlying the tracks; the roadbed of a railroad. 

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