digression vs straightness

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. 

straightness

noun
  • The result or product of being straight. 

  • The state or quality of being straight (especially in the sense of "heterosexual"). 

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