abuttal vs digression

abuttal

noun
  • The act of abutting. 

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

  • An abutment. 

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

digression

noun
  • An aside, an act of straying from the main subject in speech or writing. 

  • The act of straying from the main subject in speech or writing, (rhetoric) particularly for rhetorical effect. 

  • An elongation, a deflection or deviation from a mean position or expected path. 

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