perturb vs unman

perturb

verb
  • To disturb; to bother or unsettle. 

  • To modify the motion of a body by exerting a gravitational force. 

  • To modify slightly, such as an equation or value. 

  • To slightly modify the motion of an object. 

unman

verb
  • To deprive of men. 

  • To sap (a person) of the strength, whether physical or emotional, required to deal with a situation. 

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