indentation vs roughness

indentation

noun
  • A notch or recess, in the margin or border of anything. 

  • The act of beginning a line or series of lines at a little distance within the flush line of the column or page, as in the common way of beginning the first line of a paragraph. 

  • The act of indenting or state of being indented. 

  • A measure of the distance from the flush line. 

  • A division unit of a piece of law distinguished by its indentation or by a dash. 

  • A recess or sharp depression in any surface. 

roughness

noun
  • Something that is rough; a rough spot. 

  • A measure of how rough something is, such as a surface 

  • Abundance, especially of food. 

  • Roughage; coarse fodder. 

  • The property of being rough, coarseness. 

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