manhood vs voting age

manhood

noun
  • The self-concept of a man being with respect to his possession of the various qualities traditionally and ideally ascribed to manliness; a man's sense or view of himself as being more or less manly. 

  • He was a strapping youth poised on the brink of manhood. 

  • The state or condition of being a human being. 

  • The idealized nature of a man: all of the characteristics traditionally and ideally ascribed to manliness regarded collectively. 

  • The male genitalia, especially the penis. 

  • The state or condition of being a man. 

  • All of the men of a given place, area, or any human subgroup (ethnicity, nation, race, religion, family, work crew or ship's crew, etc.) regarded collectively. 

voting age

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