Aggressor vs evildoer

Aggressor

noun
  • a citizen/subject of the fictional Aggressor state 

name
  • a fictional state created by the United States Army for maneuver and military exercise purposes in the 1950's 

evildoer

noun
  • A person who performs evil acts. 

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