abuttal vs enclave

abuttal

verb
  • To describe a piece of land in terms of its abuttals. 

noun
  • The butting or boundary of land, particularly at the end; buttals. 

  • An abutment. 

  • The act of abutting. 

enclave

verb
  • To enclose within a foreign territory. 

noun
  • A group that is set off from a larger population by its characteristic or behavior. 

  • An isolated portion of an application's address space, such that data in an enclave can only be accessed by code in the same enclave. 

  • A political, cultural or social entity or part thereof that is completely surrounded by another. 

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